Round to estimate the answer, and then solve to find the correct answer. Explain whether your estimate was reasonable: A T. Rex dinosaur eats ten twelfths of a plant and then eats two twelfths of the plant later. How much of the plant did the dinosaur eat in total?

Answers

Answer 1

Answer:

1 plant

Step-by-step explanation:

The T.Rex dinosaur eats ten twelffths of a plant and later eats two twelfths of a plant. In total, the T.Rex dinosaur ate:

[tex]\frac{10}{12} + \frac{2}{12} =\frac{12}{12}=1[/tex]

Therefore, the dinsaur in total ate one entire plant.

It's better to solve the problem by using fractions instead of decimals. If we had used decimals the response would be the following:

[tex]0.833333+0.166666=0.999999[/tex] which can be rounded to 1.


Related Questions

A family on a trip budgets $1,000 for meals and gasoline. If the price of a meal for the family is $50 and if gasoline costs $3.50 per gallon, then how many meals can the family buy if they buy 100 gallons of gasoline?

Answers

Answer:

They can buy 13meals if they buy 100 gallons of gasoline.

Step-by-step explanation:

3.50 PER gallon so 1 gallon is $3.50

if they buy 100 gallons you have to multiply 3.50 by 100 which gives you 350. you subtract 350 from 1000 so 1000-350 and get 650. now, you divide 650 by 50 because each meal is $50. And you get 13 so there you have it.

Final answer:

The family can buy 13 meals.

Explanation:

To find the number of meals the family can buy, we need to calculate the total cost of gasoline and subtract it from the total budget.

The family buys 100 gallons of gasoline at a cost of $3.50 per gallon, so the total cost of gasoline is 100 * $3.50 = $350.

The remaining budget for meals is $1,000 - $350 = $650.

The cost of each meal is $50, so the family can buy $650 / $50 = 13 meals.

Find the solution of the equation on graphically 7r-15= r+27

Answers

6r=42
r=7
The final answer is 7

Answer:

r = 7

Step-by-step explanation:

let r = x

equation becomes

7x-15= x+27

Let the Left side AND Right side both equal y

y = 7x - 5

y = x + 27

graph these 2 equations. You should get 2 straight lines that intersect at x = 7, y = 34. (see attached)

recall at the start we let r = x, if we replace x with r again, we get r = 7

Select the correct answer.
Solve

Answers

Answer:

-44 4/9

Step-by-step explanation:

-36 4/9-(-10 2/9)-(18 2/9)

-36 4/9+10 2/9 = 26 6/9

26 6/9 - (18 2/9)= -44 4/9

The correct answer to the given fraction after simplification is equal to [tex]-44\frac{4}{9}[/tex] .

What is simplification?

" Simplification is defined as the reduce the given expression, fraction or problem into the easiest form."

Convert mixed fraction to proper fraction

[tex]p\frac{q}{r} = \frac{(r\times p)+q}{r}[/tex]

According to the question,

Given fraction,

[tex]-36\frac{4}{9}- (-10\frac{2}{9})-(18\frac{2}{9})[/tex]

Simplify the given fraction using conversion mixed fraction to proper fraction we get,

[tex]\frac{-328}{9}+ \frac{92}{9}- \frac{164}{9}\\\\= \frac{-328+92-164}{9}\\ \\= \frac{-400}{9}\\ \\= -44\frac{4}{9}[/tex]

Hence, Option(A) is the correct answer.

Learn more about simplification here

https://brainly.com/question/17482308

#SPJ2

last one anyone that can help me out?

Answers

Answer:

Part a. t = 7.29 years.

Part b. t = 27.73 years.

Part c. p = $3894.00

Step-by-step explanation:

The formula for continuous compounding is: A = p*e^(rt); where A is the amount after compounding, p is the principle, e is the mathematical constant (2.718281), r is the rate of interest, and t is the time in years.

Part a. It is given that p = $2000, r = 2.5%, and A = $2400. In this part, t is unknown. Therefore: 2400 = 2000*e^(2.5t). This implies 1.2 = e^(0.025t). Taking natural logarithm on both sides yields ln(1.2) = ln(e^(0.025t)). A logarithmic property is that the power of the logarithmic expression can be shifted on the left side of the whole expression, thus multiplying it with the expression. Therefore, ln(1.2) = 0.025t*ln(e). Since ln(e) = 1, and making t the subject gives t = ln(1.2)/0.025. This means that t = 7.29 years (rounded to the nearest 2 decimal places)!!!

Part b. It is given that p = $2000, r = 2.5%, and A = $4000. In this part, t is unknown. Therefore: 4000 = 2000*e^(2.5t). This implies 2 = e^(0.025t). Taking natural logarithm on both sides yields ln(2) = ln(e^(0.025t)). A logarithmic property is that the power of the logarithmic expression can be shifted on the left side of the whole expression, thus multiplying it with the expression. Therefore, ln(2) = 0.025t*ln(e). Since ln(e) = 1, and making t the subject gives t = ln(2)/0.025. This means that t = 27.73 years (rounded to the nearest 2 decimal places)!!!

Part c. It is given that A = $5000, r = 2.5%, and t = 10 years. In this part, p is unknown. Therefore 5000 = p*e^(0.025*10). This implies 5000 = p*e^(0.25). Making p the subject gives p = 5000/e^0.25. This means that p = $3894.00(rounded to the nearest 2 decimal places)!!!

Drag the tiles to the correct boxes to complete the pairs.
Match the subtraction expressions to their correct answers.

Answers

Answer:

Part 1) [tex]-17\frac{8}{9}[/tex] -----> [tex]-6\frac{4}{9}-3\frac{2}{9}-8\frac{2}{9}[/tex]

Part 2) [tex]-15.11[/tex] ------> [tex]-12.48-(-2.99)-5.62[/tex]

Part 3) [tex]-19\frac{8}{9}[/tex] -----> [tex]-19\frac{2}{9}-4\frac{1}{9}-(-3\frac{4}{9})[/tex]

Part 4) [tex]-201.65[/tex] -----> [tex]-353.92-(-283.56)-131.29[/tex]

Part 5) [tex]74[/tex] ------> [tex]83\frac{1}{5}-108\frac{2}{5}-(-99\frac{1}{5})[/tex]

Step-by-step explanation:

Part 1) we have

[tex]-6\frac{4}{9}-3\frac{2}{9}-8\frac{2}{9}[/tex]

To calculate the subtraction convert the mixed numbers to an improper fractions

[tex]6\frac{4}{9}=\frac{6*9+4}{9}=\frac{58}{9}[/tex]

[tex]3\frac{2}{9}=\frac{3*9+2}{9}=\frac{29}{9}[/tex]

[tex]8\frac{2}{9}=\frac{8*9+2}{9}=\frac{74}{9}[/tex]

substitute

[tex]-\frac{58}{9}-\frac{29}{9}-\frac{74}{9}=-\frac{(58+29+74)}{9}=-\frac{161}{9}[/tex]

Convert to mixed number

[tex]-\frac{161}{9}=-(\frac{153}{9}+\frac{8}{9})=-17\frac{8}{9}[/tex]

Part 2) we have

[tex]-12.48-(-2.99)-5.62[/tex]

To calculate the subtraction eliminate the parenthesis first

[tex]-12.48-(-2.99)-5.62=-12.48+2.99-5.62=-15.11[/tex]

Part 3) we have

[tex]-19\frac{2}{9}-4\frac{1}{9}-(-3\frac{4}{9})[/tex]

To calculate the subtraction convert the mixed numbers to an improper fractions

[tex]19\frac{2}{9}=\frac{19*9+2}{9}=\frac{173}{9}[/tex]

[tex]4\frac{1}{9}=\frac{4*9+1}{9}=\frac{37}{9}[/tex]

[tex]3\frac{4}{9}=\frac{3*9+4}{9}=\frac{31}{9}[/tex]

substitute

[tex]-\frac{173}{9}-\frac{37}{9}-(-\frac{31}{9})[/tex]

Eliminate the parenthesis

[tex]-\frac{173}{9}-\frac{37}{9}+\frac{31}{9}=\frac{(-173-37+31)}{9}=-\frac{179}{9}[/tex]

Convert to mixed number

[tex]-\frac{179}{9}=-(\frac{171}{9}+\frac{8}{9})=-19\frac{8}{9}[/tex]

Part 4) we have

[tex]-353.92-(-283.56)-131.29[/tex]

To calculate the subtraction eliminate the parenthesis first

[tex]-353.92+283.56-131.29=-201.65[/tex]

Part 5) we have

[tex]83\frac{1}{5}-108\frac{2}{5}-(-99\frac{1}{5})[/tex]

To calculate the subtraction convert the mixed numbers to an improper fractions

[tex]83\frac{1}{5}=\frac{83*5+1}{5}=\frac{416}{5}[/tex]

[tex]108\frac{2}{5}=\frac{108*5+2}{5}=\frac{542}{5}[/tex]

[tex]99\frac{1}{5}=\frac{99*5+1}{5}=\frac{496}{5}[/tex]

substitute

[tex]\frac{416}{5}-\frac{542}{5}-(-\frac{496}{5})[/tex]

Eliminate the parenthesis

[tex]\frac{416}{5}-\frac{542}{5}+\frac{496}{5}=\frac{(416-542+496)}{5}=\frac{370}{5}=74[/tex]

What are some terms that you use in your everyday life that are really hard to define, yet they're incredibly important and frequently used? How could you explain why undefined terms become so important when we start to write proofs in geometry?

Answers

Answer:

Step-by-step explanation:

Tough question.

Spiritual.

Love (if ever there was a misused word, it is love). I used to ask my classes what this sentence means "I love hunting." Try that one on. I don't know if you are dating someone, but how can you say "I love you." and "I love hunting." and not have something terribly wrong with the definition of the verb. One implies treasuring someone. The other means outfoxing a fox and murder.

Religion. Why are there so many different ones? The claim that there is only one true one makes the definition elusive to say the least. And it has caused a great deal of trouble.

==============================

Geometry: You have to know what a line segment is before you can say that one segment bears a relationship to another one.

You have to be able to define a point before you can calculate an intersection point of 2 lines or 2 curves or more.

You have to be able to define almost any term in geometry so that you can restrict enough to make it useful.

Three consecutive multiples of 7 have a sum of 84. What is the greatest these numbering?


A. 7

B. 21

C. 35

D. 42

Answers

Answer:

  C.  35

Step-by-step explanation:

Let x represent the largest of the multiples of 7. The sum will be ...

  x + (x -7) + (x -14) = 84

  3x = 105 . . . . . . . . . . . . . add 21 and simplify

  x = 35 . . . . . . . . . . . . . . . divide by 3

The greatest of the numbers of interest is 35.

_____

Two consecutive multiples of 7 will differ by 7. If x is the largest, the next-largest is x-7, and the one before that is x-14.

A freight train is carrying goods across the country. The distance it has traveled varies directly with the number of gallons of fuel it has used. See the graph below.

Answers

Answer:

Step-by-step explanation:

The train uses

[tex]\frac{400gallons}{200miles}[/tex]

If you reduce that you get that the train uses

[tex]\frac{2gallons}{1mile}[/tex]

To find the slope of the line, we will use the 2 points on the coordinate plane where the graph goes through:  (0, 0) and (400, 200)

Applying the slope formula:

[tex]m=\frac{200-0}{400-0}=\frac{1}{2}[/tex]

Answer:

6 miles per gallon

slope = 6

Step-by-step explanation:

Please help me with this question!

Answers

Answer:

h=2×6/8

x^2=h^2+4

x=5/2

In the figure below, segments AC and AB are tangent to circle E. If AC is equal to 10 cm, then segment AB is equal to 20 cm.

Answers

If tangents are drawn from the same spot, then they will be equal.

Since tangents AB and AC both start from point A, and go to the same circle, then:

AC = AB.

That means the statement:

'If AC is equal to 10cm, then segment AB is equal to 20cm'

is false

(if a AC  = 10cm, then AB would =  20cm as well)

_____________________________________

Answer:

False

Answer:

The given statement is false.

Step-by-step explanation:

We have been given a statement. We are supposed to determine whether our given statement is true or not.

Segments AC and AB are tangent to circle E. If AC is equal to 10 cm, then segment AB is equal to 20 cm.

We know that tangents of circle from same external point are congruent.

We can see that both tangents AB and AC are drawn from same point A, so AB will be equal to AC.

Since [tex]AB=20[/tex] and [tex]AC=10[/tex], therefore, our given statement is false.

Please help as quickly as possible (20pts)
Find the solutions to the following linear-quadratic systems algebraically. Select the ordered pair that is one of the correct solutions from among the choices below
Y=x^2+3x+8
Y=2x+10
a)(2,14)
b)(0,10)
c)(-2,6)
d)(0,8)

Answers

Answer:

  c)  (-2, 6)

Step-by-step explanation:

Subtracting the second equation from the first gives ...

  (y) -(y) = (x^2 +3x +8) -(2x +10)

  0 = x^2 +x -2 . . . . . simplify

  0 = (x -1)(x +2) . . . . factor

Solutions for x are 1 and -2. The corresponding y-values are ...

  y = 2{1, -2} +10 = {2, -4} +10 = {12, 6}

The solutions are (1, 12) and (-2, 6). The only matching choice is (-2, 6).

What is 70% of 40,000.

Answers

Answer:

x = 28,000

Step-by-step explanation:

"What" is our unknown, x; "is" is an equals sign; 70% expressed as a decimal is .70; "of" means to muliply.

Our equation, then, is

x = .70(40,000) so

x = 28,000

Answer:

28000

Step-by-step explanation:

70% of 40,000 is 28000.

28,000/40,000 = 70%

40000=100%

x=70%

40000/x=100%/70%

please help!

Which rigid transformation(s) can map FGH onto VWX?


reflection, then rotation

reflection, then translation

rotation, then translation

rotation, then dilation

Answers

Answer:

reflection, then translationrotation, then translation

Step-by-step explanation:

When the points designating each triangle are considered in order, they are seen to be in clockwise order. Segment FG is oriented to the west, while corresponding segment VW is oriented to the east. This means the figure could have been rotated 180° or reflected across a point. Either way, some translation may be necessary to align the figures as shown.

Possible transformations include ...

reflection across a point, then translation (depending on the location of the point)rotation 180° about a point, then translation (depending on the location of the point)

___

If one of the triangles is reflected across the midpoint of GW, it will coincide with the other triangle. Hence only one reflection across a chosen point is required. Of course, reflection across a point is identical to rotation 180° about that point. For any other point of reflection or rotation, translation will be involved.

Answer:

rotation, then translation

Step-by-step explanation:

rotation, then translation

Write an equation that could be used to find the value of a.

Answers

Answer:

  see below

Step-by-step explanation:

The Law of Cosines tells you ...

  a² = b² + c² -2bc·cos(A)

Substituting the given values gives you ...

  a² = 4² +7² -2(4)(7)cos(52°)

What refers to the quantity of goods and services that consumers are willing to buy at a given price?

Answers

Answer:

  "demand"

Step-by-step explanation:

Vocabulary question.

  "Demand" refers to the quantity of goods and services that consumers are willing to buy at a given price.

Leo has b boxes of pencils. Each box contains 6 pencils. He has a total of 42 pencils. The equation that represents this situation is . The value of b that makes the equation true is .

Answers

The equation for this scenario is  6b= 42.

B= 42/6= 7

The value of b that makes the equation true is 7.

Hope this helps!

Answer:

6b = 42

b = 7 for the equation to be true.

Step-by-step explanation:

If Leo has b boxes of pencils with each containing 6 pencils, it means that the total number of pencils Leo has is dependent on the number of boxes given that the number in each box is known.

The product of the number of boxes with the number in each box gives the total number of pencils Leo has. This may be expressed mathematically as

= b × 6

= 6b

Given that Leo has 42 pencils, it means that

6b = 42

Dividing both sides by 6,

b = 42/6 = 7

It means he has 7 boxes.

What is the chromatic number for the map?

Answers

Answer:

The smallest number of colors needed to color the vertices of so that no two adjacent vertices share the same color.

the smallest value of possible to obtain a k-coloring.

Final answer:

The chromatic number for a map is the minimum number of colors needed to color the regions of the map such that no two adjacent regions have the same color.

Explanation:

The chromatic number for a map is the minimum number of colors needed to color the regions of the map such that no two adjacent regions have the same color.

The chromatic number can vary depending on the specific map and its regions. To determine the chromatic number, one approach is to use a graph-theoretic representation of the map, where each region corresponds to a vertex and adjacent regions are connected by edges. Then, a graph coloring algorithm can be used to find the minimum number of colors needed to properly color the regions of the map.

HELPP PPLEASEEE!!!
A ship moves through the water at 30 miles/hour at an angle of 30° south of east. The water is moving 5 miles/hour at an angle of 20° east of north. Identify the ship's vector, the water current's vector, and the vector representing the ship's actual motion.

Answers

Answer:

See below in bold.

Step-by-step explanation:

Ship's vector:

Horizontal component = 30 cos 30  = 25.98.

Vertical component = 30 sin(-30) = -15.

So it is <25.98, -15).

The current's vector:

Horizontal component =  5 sin 20 = 1.71.

Vertical component = 5 cos 20 = 4.7.

So it is <1.71, 4.7>.

Final answer:

The ship's vector representing its actual motion is 30.73 mph east of north.

Explanation:

To solve this problem, we can break down the velocities of the ship and the water current into their horizontal and vertical components. The ship's vector can be represented as:

Ship's Vector: 30 mph at an angle of 30° south of east

Breaking this down into horizontal and vertical components:

Horizontal Component = 30 mph * cos(30°) = 25.98 mph east

Vertical Component = 30 mph * sin(30°) = 15 mph south

The water current's vector can be represented as:

Water Current's Vector: 5 mph at an angle of 20° east of north

Breaking this down into horizontal and vertical components:

Horizontal Component = 5 mph * cos(20°) = 4.75 mph north

Vertical Component = 5 mph * sin(20°) = 1.71 mph east

To find the ship's actual motion, we can add the horizontal and vertical components together:

Horizontal Component = 25.98 mph east + 4.75 mph north = 30.73 mph east of north

Vertical Component = 15 mph south + 1.71 mph east = 16.71 mph south of east

Therefore, the ship's vector representing its actual motion is 30.73 mph east of north.

For safety reasons, four different alarm systems were installed in the vault containing the safety deposit boxes at a Beverly Hills bank. Each of the four systems detects theft with a probability of .99 independently of the others. The bank, obviously, is interested in the probability that when a theft occurs, at least one of the four systems will detect it. This probability is equal to:

Answers

Answer:

Given is :

4 different alarm systems were installed in the vault.

Each of the four systems detects theft with a probability of .99 independently of the others.

For solving this question, we have to first find the probability that none works.

It will be given as:

As there is 0.01 probability that all four systems will fail to detect theft. As all are independent, we get probability as: [tex](0.01)^{4}[/tex]

Now, we have to find the probability that at least one system detects the theft, it is given by:  [tex]1 -(0.01)^{4}[/tex]

Cate solved an inequality to find c, the possible number of cats that a shelter can house. She found that c < 28. Which statement best describes a possible solution to Cate's problem?

Answers

Since the number of cats has to be less than 28, a statement could be "the shelter can house no more than 28 cats.

Answer:

Possible values of c are

[tex]c=0,1,2,3,4,...,26,27[/tex]

For example: The shelter can house 17 cats because 17 < 28.

Step-by-step explanation:

Let c be the number of cats.

The given inequality is

[tex]c<28[/tex]

We need to find the possible number of cats that a shelter can house.

The number number of cats can not be

1. A fraction value

2. A Decimal value

3. A negative value

Since c<28, therefore the number of cats must be greater that or equal to 0 and less that 28.

[tex]0\leq c<28[/tex]

The possible values of c are

[tex]c=0,1,2,3,4,...,26,27[/tex]

For example: The shelter can house 17 cats because 17 < 28.

Starting at home Jessica traveled uphill to the toy store for 12 minutes at just 10 mph. She then traveled back home along the same path downhill at a speed of 30 mph. What is her average speed for the entire trip from home to the toy store and back?

Answers

Answer:

15 miles per hour

Step-by-step explanation:

Average Speed is:

Average Speed = Total Distance/Total Time

Going uphill, she took 12 minuets, that is hours is 12/60 = 0.2 hours

We know D = RT, Distance = Rate(speed) * Time

Thus,

D = 10mph * 0.2 hr = 2 miles

So, total distance (uphill and downhill) = 2 + 2 = 4 miles

Downhill the time she took is

D = RT

2miles = 30mph * T

T = 2/30 = 1/15 hours = 1/15 * 60 = 4 minutes

Hence total time is 12 + 4 = 16 minutes

Note: 16 minutes = 16/60 = 4/15 hours

Now

Average Speed = Total Distance/Total Time

Average Speed = 4 miles/ 4/15 hours = 15 mph

Answer:

The Answer is 15.00000000000000000... miles per hour

Step-by-step explanation: You do tis by doing your work and not checking for answers

PLS HELP ME !

The angle of depression of a point P on the ground, from the top T of the building is 23.6 degrees . If the distance from P to the foot of the building is 50m, calculate the height of the building, correct to the nearest meter.

Answers

Final answer:

To find the height of the building, we use the tangent function with the angle of depression and the horizontal distance from the point to the building's base, resulting in a building height of 22 meters when rounded to the nearest meter.

Explanation:

To calculate the height of the building when the angle of depression from the top of the building to a point P on the ground is 23.6 degrees and the distance from P to the foot of the building is 50 meters, we can use trigonometry.

Specifically, we use the tangent function which relates the angle of a right triangle to the ratio of the opposite side (height of the building in this case) over the adjacent side (distance from P to the foot of the building).

Let's denote the height of the building as H. Thus, we have:

tan(23.6°) = H / 50

From this, we can solve for H:

H = 50 × tan(23.6°)

Using a calculator, tan(23.6°) approximately equals 0.4364.Therefore, H = 50 × 0.4364 which equals 21.82 meters.

Rounding to the nearest meter, the height of the building is 22 meters.

In order to estimate the mean amount of time computer users spend on the internet each​ month, how many computer users must be surveyed in order to be 90​% confident that your sample mean is within 13 minutes of the population​ mean? Assume that the standard deviation of the population of monthly time spent on the internet is 228 min

Answers

Answer:

832

Step-by-step explanation:

standard deviation =228 minute

error =13 minute given

confidence level =905% =0.90

α=1-0.90=0.1

[tex]z_\frac{\alpha }{2}=z_\frac{0.1}{2}=1.645[/tex]

we know that sample size should be greater than

[tex]n\geq \left ( z_\frac{\alpha }{2}\times \frac{\sigma }{E} \right )^2[/tex]

[tex]n\geq \left ( 1.645\times \frac{228}{13} \right )^{2}[/tex]

[tex]n\geq 28.850^2[/tex]

[tex]n\geq 832.3668[/tex]

n=832

Solve the problem.


The library is to be given 3 books as a gift. The books will be selected from a list of 16 titles. If each book selected must have a different title, how many possible selections are there?



48



560



3360



4096

Answers

Answer:

560

Step-by-step explanation:

You must use a combination:

[tex]_nC_k=\dfrac{n!}{k!(n-k)!}[/tex]

We have n = 16, k = 3.

Substitute:

[tex]_{16}C_3=\dfrac{16!}{3!(16-3)!}=\dfrac{13!\cdot14\cdot15\cdot16}{2\cdot3\cdot13!}\qquad\text{cancel}\ 13!\\\\=\dfrac{14\cdot15\cdot16}{2\cdot3}=\dfrac{7\cdot5\cdot16}{1}=560[/tex]

The number of possible selections is 560.

Given information:

The library is to be given 3 books as a gift. The books will be selected from a list of 16 titles.

Calculation of number of selections;

Here we used the combination

[tex]= nC_n\\\\= 16C_3\\\\= \frac{16!}{3!(16-3)!}\\\\ = \frac{16!}{3!13!}\\\\ = \frac{16\times 15\times 14\times 13!}{13!3!}\\\\ = \frac{16\times 15\times 14}{3\times 2\times 1}\\[/tex]

= 560

learn more about the book here: https://brainly.com/question/19461476

Using the value found in the previous question, find the measure of angle R and the measure of angle Q.

Answers

Answer:

∠R = 36.06°, ∠Q = 90.81°

Step-by-step explanation:

I used the Law of Cosines to find angle R first.  If you use the Law of Sines, the main angle is the same, but it differs in the decimal value.  Since you started the process with the Law of Cosines, I used it again.  Setting up to find angle R:

[tex]36^2=48^2+60^2-2(48)(60)cosR[/tex] and

1296 = 2304 + 3600 - 5760cosR so

-4608 = -5700cosR and

.8084210526 = cosR

Taking the inverse cosine to find the angle,

R = 36.06

That means that Q = 180 - 36.06 - 53.13 so

Q = 90.81

Lola needs to sign 96 invitations. Using a stopwatch that measures time to tenths of a second, it takes Lola 5.3 seconds to sign her full name. Going by the accuracy of the stopwatch, which is the most accurate determination for the number of minutes Lola needs to sign all 96 invitations?3.3 minutes3.3125 minutes8.48 minutes8.5 minutes

Answers

96 times 5.3 divide by 60, equal to 8.48 minutes, the third choice is correct

Find the distance between the points (1, 5) and (1, -4).

Answers

Answer:

9

Step-by-step explanation:

[tex]\tt distance=\sqrt{(1-1)^2+(-4-5)^2}=\sqrt{0^2+9^{2}}=\sqrt{9^2} =9[/tex]

The formula for distance between two points is:

[tex]\sqrt{(x_{2} -x_{1})^{2} + (y_{2} -y_{1})^{2}}[/tex]

In this case:

[tex]x_{2} =1\\x_{1} =1\\y_{2} =-4\\y_{1} =5[/tex]

^^^Plug these numbers into the formula for distance like so...

[tex]\sqrt{(1-1)^{2} + (-4-5)^{2}}[/tex]

To solve this you must use the rules of PEMDAS (Parentheses, Exponent, Multiplication, Division, Addition, Subtraction)

First we have parentheses. Remember that when solving you must go from left to right

[tex]\sqrt{(1-1)^{2} + (-4-5)^{2}}[/tex]

1 - 1 = 0

[tex]\sqrt{(0)^{2} + (-4-5)^{2}}[/tex]

-4 - 5 = -9

[tex]\sqrt{(0)^{2} + (-9)^{2}}[/tex]

Next solve the exponent. Again, you must do this from left to right

[tex]\sqrt{(0)^{2} + (-9)^{2}}[/tex]

0² = 0

[tex]\sqrt{0 + (-9)^{2}}[/tex]

(-9)² = 81

[tex]\sqrt{(0 + 81)}[/tex]

Now for the addition

[tex]\sqrt{(0 + 81)}[/tex]

81 + 0 = 81

√81

^^^This can be further simplified to...

9

***Remember that the above answers are in terms of units

Hope this helped!

~Just a girl in love with Shawn Mendes

An inlet pipe on a swimming pool can be used to fill the pool in 40 hours. The drain pipe can be used to empty the pool in 42 hours. If the pool is 23 filled and then the inlet pipe and drain pipe are opened, how long from that time will it take to fill the pool?

Answers

Answer:

Pool will be filled in 280 hours

Step-by-step explanation:

Inlet pipe fills in  40 hours = 1 pool

Inlet pipe fills in 1 hours = [tex]\frac{1}{40}[/tex]

Drain pipe empty in 42 hours = 1 pool

Drain pipe empty in 1 hour =  [tex]\frac{1}{42}[/tex]

If both pipes are opened together

 then in pool fills in 1 hour =  [tex]\frac{1}{40}[/tex] -  [tex]\frac{1}{42}[/tex]

      on simplifying the right side ,we get  [tex]\frac{42-40}{(40)(42)}[/tex]

                                                                 =      [tex]\frac{2}{(40)(42)}[/tex]

                                                                 =     [tex]\frac{1}{840}[/tex]

      [tex]\frac{1}{840}[/tex]  pool fills in 1 hour

                       1 pool will be filled in 840 hours

    [tex]\frac{2}{3}[/tex]     pool is filled

empty pool =  1 - [tex]\frac{2}{3}[/tex] =  [tex]\frac{1}{3}[/tex]

therfore  [tex]\frac{1}{3}[/tex] pool will be filled in     [tex]\frac{1}{3}[/tex]X 840 =

                                                                                           = 280 hours

The  calculations indicate that 280 hours is the  time required to fill 2/3 of the pool with both pipes open.

Inlet Pipe Rate:

The inlet pipe can fill the pool in 40 hours.

Therefore, the rate of the inlet pipe is 1/40 pool per hour.

Drain Pipe Rate:

The drain pipe can empty the pool in 42 hours.

Therefore, the rate of the drain pipe is 1/42 pool per hour.

Combined Rate when both pipes are open:

The net rate when both pipes are open is the difference between their individual rates:

Net rate = (1/40) - (1/42)

Simplify the Net Rate:

Find a common denominator for 40 and 42, which is 840:

Net rate = (42 - 40) / 840 = 2/840 = 1/420

Time to Fill 2/3 of the Pool:

Set up the equation: Net rate * Time = 2/3

Substitute the net rate: (1/420) * Time = 2/3

Cross-multiply to solve for time: Time = (2/3) * (420/1) = 280

Therefore, it takes 280 hours to fill 2/3 of the pool when both the inlet and drain pipes are open.

To learn more about Time

https://brainly.com/question/479532

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This is a Fractions as division word problems. NEED HELP!!​

Answers

Answer:

The answer is between 2 to 3 scoops.

Answer:

The only logical answer would be between 2 and 3 scoops

HELPPPPPPP!!!!! Can someone help with this problem?? WILL MARK BRAINLIEST
Find an equation for the line below.

Answers

Answer:

[tex]y=\frac{-4}{3}x+\frac{-4}{3}[/tex] slope-intercept form

[tex]y+4=\frac{-4}{3}(x-2)[/tex] point-slope form

Step-by-step explanation:

Equation of a line in point-slope form is y-y_1=m(x-x_1) where m is the slope and b is the [tex](x_1,y_1)[/tex] is a point on the line.

So the m, slope, can be found by calculating the rise/run from one to another point on the line.

So let's start at (2,-4) and count to (-4,4).

So the rise is 8 and the run is -6.

The slope is therefore 8/-6=-8/6=-4/3.

Now if you didn't want to count because you can't count all the time.

You could line up the two points and subtract vertically, then put 2nd difference over 1st difference.

Like this:

(  2  ,   -4)

(-4  ,      4)

---------------

6          -8

So the slope is -8/6=-4/3.

Anyways now using any point on the line as [tex](x_1,y_1)[/tex] along with the slope we found we can finally put into our equation for point-slope form:

[tex]y-y_1=m(x-x_1)[/tex]

with [tex](x_1,y_1)=(2,-4)[/tex] and [tex]m=\frac{-4}{3}[/tex].

This gives us:

[tex]y-(-4)=\frac{-4}{3}(x-2)[/tex]

[tex]y+4=\frac{-4}{3}(x-2)[/tex]

We probably want to put into y=mx+b form; not 100% sure so I will give you choices:

y=mx+b is called slope-intercept form because it tells us the slope is m and the y-intercept is b.

[tex]y+4=\frac{-4}{3}(x-2)[/tex]

Distribute the -4/3 to the terms inside the ( ):

[tex]y+4=\frac{-4}{3}x+\frac{8}{3}[/tex]

Subtract 4 on both sides:

[tex]y=\frac{-4}{3}x+\frac{8}{3}-4[/tex]

Simplify the (8/3)-4:

[tex]y=\frac{-4}{3}x+\frac{-4}{3}[/tex]

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