Mathematics College

HELPPP PLLLZZZ III BEEEG

For what value of x is the square of the binomial x+1 twenty greater than the square of the binomial x–3?

Answers

Answer 1
Asked and answered elsewhere.
https://brainly.com/question/9124477
Answer 2

Answer:

x=3.5 they did nothing wrong but I am pretty sure you meant not twenty but one hundred and twenty for that the answer is x=16

Step-by-step explanation:

Related Questions

If the side length of a square pyramid is triple and the slant height is divided by 5 what would be the formula to find the modified surface area

Answers

If the original side length is "s" and the original slant height is "h", the original surface area is
.. S = (base area) +(lateral area)
.. S = s² +(1/2)*(4s)*h
.. S = s(s +2h)

Now, if we make these replacements: s ⇒ 3s, h ⇒ h/5, we have
.. S' = (3s)(3s +2h/5)
.. S' = 9s² +(6/5)s*h . . . . . . . the formula for the modified area (in terms of original dimensions)

_____
Of course, in terms of the modified dimensions, the formula is the same:
.. S' = s'(s' +2h')

At what Kelvin temperature will a sample of gas occupy 12 liters if the same sample occupies 8 liters at 27 °C?

Question 11 options:

45.0K


450K


40.5K


405K

Answers

Since the gas it is getting compressed with a change on temperature, we consider that the pressure is constant, and of course the number of mole is constant (same gas), therefore, from the ideal gas law
P
V
=
n
R
T
we can say:
V
T
=
constant
Therefore,
V
1
T
1
=
V
2
T
2
⇒
T
1
=
V
1
×
T
2
V
2
⇒
T
1
=
12
L
×
300
K
8
L
=
450
K
A=450k

Two numbers have a difference of 0.7 and a sum of 1 . What are the numbers ?

Answers

The two numbers are 0.85 and 0.15

0.85 + 0.15 = 1
0.85 - 0.15 = 0.7


hope this helps

New grass seeds grow rapidly. A grass seed has grown to 12 millimeters tall. tomorrow it will be 23 millimeters tall, the next day it will be 24 millimeters tall. and on the next day it will be 45 millimeters tall. write a rule to represent the height of the bean plant as an arithmetic sequence. how tall will the plant be in 15 days?

A) A(n) = 16 + (n-1) 11: 194 millimeters
B) A(n) = 12 + (n-1) 11: 166 millimeters
C) A(n) = 13n: 195 millimeters
D) A(n) = 12n; 180 millimeters

Answers

Assuming that the second day the plant was 34 mm tall, B would be the correct answer.
B) A(n) = 12 + (n-1) 11: 166 millimeters

Noel is playing a game where he draws one playing card each out of two stacks of 5 cards. The table below shows all possible sums for the two numbers on the cards.

Answers

Noel is more likely to draw two cards with a sum that is greater than 13.

To determine which outcome is more likely, let's count the number of combinations that meet each criterion.

1. **Sum that is a multiple of 3**:

  - Possible sums: 3, 6, 9, 12

  - Counting the combinations:

    - 3: 1 combination

    - 6: 2 combinations

    - 9: 3 combinations

    - 12: 4 combinations

  - Total combinations: 1 + 2 + 3 + 4 = 10 combinations.

2. **Sum greater than 13**:

  - Possible sums: 14, 15, 16, 17, 18, 19, 20, 21, 22, 23

  - Counting the combinations:

    - 14: 1 combination

    - 15: 2 combinations

    - 16: 2 combinations

    - 17: 3 combinations

    - 18: 2 combinations

    - 19: 3 combinations

    - 20: 2 combinations

    - 21: 3 combinations

    - 22: 1 combination

    - 23: 1 combination

  - Total combinations: 1 + 2 + 2 + 3 + 2 + 3 + 2 + 3 + 1 + 1 = 20 combinations.

Comparing the total combinations, we see that there are more combinations with a sum greater than 13 (20 combinations) than there are combinations with a sum that is a multiple of 3 (10 combinations). Therefore, Noel is more likely to draw two cards with a sum that is greater than 13.

The probable question may be:

Noel is playing a game where he draws one playing card each out of two stacks of 5 cards. The table below shows all possible sums for the two numbers on the cards.

3, 6, 7, 9, 1

1 = 4, 7, 8, 10, 12

4 = 7, 10, 11, 13, 15

6 = 9, 12, 13, 15, 17

8 = 11, 14, 15, 17, 19

12 = 15, 18, 19, 21, 23

Is Noel more likely to draw two cards with a sum that is a multiple of 3 or two cards with a sum that is greater than 13?

Noel is more likely to draw two cards with a sum greater than 13, as there are 37 combinations compared to 11 combinations for multiples of 3.

To determine whether Noel is more likely to draw two cards with a sum that is a multiple of 3 or two cards with a sum that is greater than 13, we can analyze the table provided.

1. Sum that is a multiple of 3:

  - There are several combinations of card values that result in a sum that is a multiple of 3. We can count these combinations from the table:

    - (3, 4), (3, 7), (3, 9), (3, 12)

    - (6, 7), (6, 10), (6, 12)

    - (7, 8), (7, 11)

    - (9, 10), (9, 13)

    - (11, 12)

2. Sum greater than 13:

  - We need to count the combinations of card values that result in a sum greater than 13:

    - (6, 8), (6, 10), (6, 11), (6, 12), (6, 13), (6, 15), (6, 17)

    - (7, 8), (7, 9), (7, 10), (7, 11), (7, 12), (7, 13), (7, 15), (7, 17), (7, 19)

    - (9, 10), (9, 11), (9, 12), (9, 13), (9, 15), (9, 17), (9, 19)

    - (11, 12), (11, 13), (11, 15), (11, 17), (11, 19)

    - (12, 13), (12, 15), (12, 17), (12, 19)

    - (13, 15), (13, 17), (13, 19)

    - (15, 17), (15, 19)

    - (17, 19)

After counting the combinations, we can compare the number of combinations in each category:

1. Sum that is a multiple of 3:

  - Total combinations: 11

2. Sum greater than 13:

  - Total combinations: 37

Comparing the totals, we can see that Noel is more likely to draw two cards with a sum that is greater than 13, as there are more combinations resulting in this outcome.

Complete Question:

solve the system of equations by substitution y=5x-13 and 5x+2y=19

Answers

y = 5x - 13 ----------- (1)
5x + 2y = 19 --------- (2)

Sub (1) into (2):

5x + 2(5x -13) = 19
5x + 10x - 26 = 19
15x = 19 + 26
15x = 45
x = 3 -------- sub back into (1)
y = 5(3) - 13
y = 15 - 13
 y = 2

Ans: x = 3, y = 2

A stained glass window is in the shape of an equilateral triangle. what is the measure of one interior angle of the triangle

Answers

For an equilateral triangle, the only angle for the inside can be 60 degrees. 

60° x 3 (Angles) = 180°

A circle has a circumference of 361π. What is the diameter of the circle?

Answers

Circumference of a circle = πD

Given that the circumference = 361π

πD =  361π

D = 361 units

The formula to find circumference of circle is given by

[tex] C =2\pi r [/tex]

Where r is radius of circle and pi =3.14

We are given Circumference here as 361π

Plugging the value in the formula :

[tex] 361\pi =2\pi r [/tex]

r=361/2 = 180.5

radius of circle is 180.5.

We know that Diameter is double of radius.

So diameter = 2*180.5 = 361

Answer: Diameter of circle is 361.

A cardboard sheet is cut in the shape of a triangle, with vertices at (0,0), (20,0), and (3,4) units. the thickness of the sheet is uniform. what is the x-coordinate of its center of mass?

Answers

This problem can be solved in two ways, the long way, or the short way.

1. The long way
We know that the base of the triangle is along the x-axis, and the length of the base is 20.
The centre of mass is located at 2/3 of the distance from vertex (3,4) along the median, which cuts the base at (10,0).
Therefore the centre of mass is located at
x=3+(10-3)*2/3=23/3
y=4/3

2. The short way
It turns out that the centre of mass of a triangle sheet is located at the mean of the coordinates of the three vertices, i.e.
CG=((0+20+3)/3, (0+0+4)/3)=(23/3, 4/3)  as before.

I need help on this one.

Answers

we have that
6-3+4x+1-----------> Group terms 
(6-3+1)+4x
(3+1)+4x
4+4x

this is the equation of a line f(x)=4x+4
the domain is the interval (-∞,∞)
there are infinitely solutions for x---------> see the attached figure

Martin needs 60 meters of fence to go around a rectangular garden.
The length, l, of the garden is twice its width w.
Three of these equations give the correct value for w.

Which equation does NOT?



2 • w + 2 • 2w = 60


2 • (2w + w) = 60


w + 2w = 60


w + 2w + w + 2w = 60

Answers

w + 2w = 60 would be your answer.

Answer:

w + 2w = 60

Step-by-step explanation:

w + 2w = 60

This equation will not give you the correct value for W because W is the siez or represents the size of the smaller side, since you have 4 sides, 2 small and 2 big, the sum of this 4 sides will be the perimeter, or the total meters of fence needed, since the total meter of fence need is 60 and in the equation you just have 2 sides, the value for W will be double than the real.

A gardener crosses tall true-breeding pea plants with short true-breeding ones. Tall plants are dominant to short ones. He collects the seeds to grow F1 plants and then allows them to self-pollinate to form an F2 generation. Which of the following describes the traits of the offspring correctly?

Answers

The responses given are as follows;
a) Three–fourths of the F1 and one–half of the F2 plants will be tall.
b) All of the F1 and three–fourths of the F2 plants will be tall.
c) Three–fourths of the F1 and all of the F2 plants will be tall.

Let’s name tall as T and short as t
Since both are true breeding plants
Tall plants have the genotype TT and short plants have the genotype tt
Tall plants will make gametes of type T only
Short plants make gametes of type t only
After cross breeding the offspring would all be of genotype Tt as they’re made of T and t gametes
F1 generation formed have the genotype Tt
Since T is dominant all F1 plants are tall
When F1 self pollinates
F1 * F1
Tt *Tt
Gametes are
T t T t
F2 population offspring genotypes are as follows;
TT -1/4 tall
Tt -1/4 tall
Tt -1/4 tall
tt - 1/4 short
3/4 of the plants are tall
Remaining 1/4 is short

Therefore response b is correct
All f1 plants are tall and 3/4 of f2 plants are tall

An experienced roofer can roof a house in 26 hours. A beginning roofer needs 39 hours to complete the same job. Find how long it takes for the two to do the job together

Answers

The way to do this is to use the formula
1/r1 + 1/r2 = 1/rt
r1 = time for roofer 1 in hours = 26 hours.
r2 = time for roofer 2 in hours = 39 hours.

1/26 + 1/39 = 1/rt
0.03846 + 0.02564 = 1/rt
0.06410 = 1/rt ****** (I've used these stars later on. Ignore them now) 

You could go on one of two ways. You could put 1 one under 0.06410 and cross multiply. I'll do that first.

0.06410 / 1 = 1/rt
0.06410 * rt = 1 * 1
0.06410 * rt = 1 Now divide by the number on the left.
rt = 1/0.06410
rt = 15.6

Or you could do this. Go back to the step with the stars. 
Turn both steps upside down

0.06410 = 1 / r2 Take the reciprocal of both sides.
1/0.06410 = r2
r2 = 15.6 hours for both roofers working together.

There are other ways of doing this problem. None are any quicker. The point is that your answer should come to a number below either of the workers. It makes sense. The slower worker still does some work, but the faster worker does most of it.

Final answer:

The experienced roofer and the beginning roofer together can complete the job in approximately 15.6 hours, which is found by adding their work rates and taking the reciprocal of the sum.

Explanation:

To find how long it takes for both an experienced and a beginning roofer to roof a house together, we need to sum their work rates and then find the reciprocal of that sum. We'll start by considering the work rates of both the experienced and the beginning roofer. The experienced roofer can roof a house in 26 hours, which means the roofer completes 1/26 of the job per hour. The beginning roofer completes the job in 39 hours, which is 1/39 of the job per hour.

Now, we can calculate their combined work rate:
1/26 + 1/39 = (39 + 26) / (26 * 39) = 65 / 1014 = 1/15.6

These two roofers together complete 1/15.6 of the job per hour. To find out how long it will take them to complete the job together, we take the reciprocal of this rate:
1 / (1/15.6) = 15.6 hours.

Therefore, it would take the experienced and beginning roofer combined around 15.6 hours to roof the house together.



There are four steps in solving one’s personal financial challenges:

1. considering opportunity costs
2. assessing risks and returns
3. setting short- and long-term goals
4. assessing needs and wants

Which of these is the correct order of these steps?


2, 3, 1, 4

1, 2, 3, 4

4, 1, 2, 3

3, 1, 4, 2

Answers

Answer: C. 4, 1, 2, 3.

I hope this helps :)

Answer: Third option is correct.

Step-by-step explanation:

Since there are four steps in solving one's personal financial challenges:

1) First he needs to assessing the needs and wants .

2) Then, he will consider opportunity costs, i.e. next best alternative.

3) Then, he will assessing the risks and returns associated with the opportunity costs.

4) Last, but not the least, he will be setting short and long term goals.

So, The correct order of these steps is 4,1,2,3.

Hence, Third option is correct.

help please in eed answers asap

Answers

A cube has the same length for its height, width, and length.  So to find the volume, we multiply:

4.2 x 4.2 x 4.2 = 74.088 cm^3

Answer:

74,088 cm³

Step-by-step explanation:

[tex]whl = V \\ \\ [4,2]^{3} = 74,088[/tex]

I am joyous to assist you anytime.

Simplify (- 5/8) divided by (-3/4)
A: 20/24
B: -20/24
C: -15/32
D: 15/32

Answers

 [tex]-\frac{5}{8} : -\frac{3}{4}= \frac{5}{8}* \frac{4}{3} = \frac{20}{24} = \bold{\frac{5}{6} }[/tex]

The answer is A  (20/24)
(-5/8) / (-3/4)


 Step 1: -5/8 · 4/-3 


Step 2: -5 · (-4)
             ______             
               8 · 3   


Step 3: 20/24


Answer: 5/6

Your answer is 5/6                                       


Hope I helped!

Let me know if you need anything else!

~ Zoe (Rank:'Genius')

Will someone please find the value of x for these questions

Answers

Try this solution:

12) for h=√(10²-6²)=8
then 
[tex] \frac{x-6}{8} = \frac{8}{6}; \ =\ \textgreater \ \ x= \frac{50}{3} [/tex]

14) 6:11 as x:10. It means that
[tex] \frac{6}{11} = \frac{x}{10}; \ =\ \textgreater \ \ x=6*10/11= \frac{60}{11} [/tex]

If the APY of a savings account is 5.3%, and if the principal in the savings account is $5100 for an entire year, what will be the balance of the savings account after all the interest is paid for the year?
A. $5300.00
B. $5127.03
C. $5100.00
D. $5370.30

Answers

the answer is D. hope this helps

Answer:

Option D - $5370.30

Step-by-step explanation:

Given : If the APY of a savings account is 5.3%, and if the principal in the savings account is $5100 for an entire year.

To find : What will be the balance of the savings account after all the interest is paid for the year?          

Solution :

First we find the interest he paid.

The interest formula is [tex]I=P\times R\times T[/tex]

Where, P is the principal P=$5100

R is the rate of interest R=5.3%=0.053

T is the time T=1 year

Substituting the values,

[tex]I=5100\times 0.053\times 1[/tex]              

[tex]I=\$270.3[/tex]                  

The balance of the saving account is the sum of interest paid and principal value.

Amount = Interest +Principal

Amount = $270.3 +$5100          

Amount = $5370.3

Therefore, Option D is correct.      

Carlos’s hockey team has ten players, not counting the goalie.Five non goalie players need to be selected for a starting line-up.

A)How many different starting lineups are possible if positions are not assigned?

B)How many starting lineups are possible if positions are assigned?

Answers

Final answer:

There are 252 different starting lineups possible if positions are not assigned, and 30,240 starting lineups are possible if positions are assigned.

Explanation:

For part A of the question, where positions are not assigned, we can calculate the number of different starting lineup combinations by using the combination formula. Since we are choosing 5 players out of 10 without regard to order, we use:

C(n, k) = n! / (k!(n-k)!)

Where n is the total number of players to choose from, and k is the number of players we want to choose. Therefore, we have:

C(10, 5) = 10! / (5! (10-5)!) = 252

There are 252 different starting lineups possible if positions are not assigned.

For part B, where positions are assigned, we use the permutation formula because the order in which we select the players matters. This formula is:

P(n, k) = n! / (n-k)!

Since the order in which the players are chosen matters, we have:

P(10, 5) = 10! / (10-5)! = 30,240

There are 30,240 different starting lineups possible with positions assigned.

What is the product of (-1/4) x (-3/7)? Write your answer in simplest fraction form

Answers

[tex]\frac{-1}{4}\times \frac{-3}{7} = \frac{(-1)(-3)}{(4)(7)} = \frac{3}{28}[/tex]

What is the slope of the line on the graph. I need help I!!!

Answers

From just looking at the graph we can already notice that the slope is gonna be a negative since the line is going downhill.

So using the Rise Over Run we can calculate the slope, from each point the slope rises 2 and runs -6 (-2/6) then simplify to -1/3

-1/3 is your slope

HELP WILL MARK BRAINLIEST
Use the net to find the lateral area of the cylinder
height is 9inch and radius is 5inch

Answers

Lateral Area = 2πrl

Lateral Area = 2 x π x 5 x 9 

Lateral Area = 282.74 in²

---------------------------------------------------------------------------
Answer: The lateral area of the cylinder is 282.74 in²
---------------------------------------------------------------------------

What number fills in the blank to complete the factorization of 3x + 24?


(x + 8)

Answers

Answer:

The factor form of given expression is 3(x+8) so the required number is 3.

Step-by-step explanation:

The given expression is

[tex]3x+24[/tex]

Write the factors of each term.

[tex]3x+24=3\times x+3\times 8[/tex]

In both terms, 3 is a common factor.

Take out the common factor 3.

[tex]3x+24=3(x+8)[/tex]

The factor form of given expression is 3(x+8). The factor (x+8) is given, therefore the required number is 3.

How many 4-sequences on {0..9} do not begin with 0?

Answers

I take a [tex]n[/tex]-sequence to mean any permutation of the digits 0-9 of length [tex]n[/tex]. Furthermore, I'm assuming no number can be repeated.

If that's the case, then for any 4-sequence, the first digits place (leftmost) has 9 possible choices (1-9). Once that number is used up, we have 9 numbers left in the pool of digits, from which we select a 3-sequence. The number of possible 3-sequences would be [tex]\dfrac{9!}{3!}=60,480[/tex]. Multiply this by 9 (to account for the first digit's possibilities) and we get a grand total of [tex]\dfrac{9\times9!}{3!}=544,320[/tex] possible 4-sequences on [tex]\{0,\ldots,9\}[/tex].

There are 9000 possible 4-sequences that do not begin with the digit 0.

The question asks how many 4-sequences on the set {0..9} do not begin with 0. To solve this, we need to consider the number of possible options for each of the four positions in the sequence, knowing that the first digit cannot be 0.

For the first position, there are 9 options (1-9), since 0 is not allowed. For the next three positions, each can be any of the 10 digits (0-9), since there are no restrictions. Thus, the total number of such sequences is the product of the number of options for each position.

9 options (1st position) x 10 options (2nd position) x 10 options (3rd position) x 10 options (4th position) = 9 x 10 x 10 x 10 = 9000.

So, to find how many 4-sequences do not begin with 0, multiply the number of choices for each position: 9 (first position, cannot be 0) x 10 (second position) x 10 (third position) x 10 (fourth position), resulting in 9000 such sequences.

solve the system of equations 6X + 5 y equals 55 + 6 x + 5 y equals 60

Answers

6x+5y=55+6x+5y
-5y. -5y
6x. =55+6x
-6x. -6x
0=55


no solution
No solution there is no solution

Help please !!!!!!! .......

Answers

The table represents a geometric sequence because the successive y-values have a common ratio of 0.6

A geometric sequence is a sequence of numbers, where the successive values after the first is found by multiplying the previous one by a fixed, non-zero number called the common ratio. In this case the common ratio is 0.6.

5 * 0.6 = 3
3 * 0.6 = 1.8
1.8 * 0.6 = 1.08

Compute the area of the triangle ( express answer in cm2

Height =6 cm

Base= 12cm

Answers

The formula for the area of a triangle is 1/2bh
1/2(12)(6)
1/2(72)
36cm2 is the answer.

Answer:

36 cm^2

Step-by-step explanation:

An after school club is building a clubhouse that has a rectangular floor that is 8 feet by 6 feet. What is the total floor area in square inches of the clubhouse?

Answers

The area of the school club would be 48. The answer is 48 because 6 x 8 is 48 and area = length x width. Have a great day and I hope I could help you!
48 is the final answer! :)

Write the following decimal number in its equivalent fraction form. Show all work for full credit.
0.8(repeating)

Answers

Let x=0.8888... 

x=0.8888 Start with the given equation 

10x=8.8888 Multiply both sides by 10. The goal is to move the decimal point to the next repeating portion (which is just one spot to the right) 



 Now subtract the equation x=0.8888 from 10x=8.8888 to get 
10x-x=8.8888-0.8888 

9x=8 Combine like terms. Notice how the decimal portions cancel out. 

x=8/9 Divide both sides by 9 to isolate x 

So the answer is x=8/9 which means that 8/9=0.8888 (where the 8's repeat)
 
Final answer:

To write the decimal number 0.8(repeating) as a fraction, use the concept of an infinite geometric series and convert it to an equation. Multiply both sides of the equation by 10 to eliminate the decimal point and subtract the original equation to eliminate the repeating part. Finally, divide by 9 to get the equivalent fraction form.

Explanation:

To write the decimal number 0.8(repeating) as a fraction, we can use the concept of an infinite geometric series. Let's assume the repeating decimal as x: x = 0.8(repeating). Now, multiply both sides of the equation by 10 to remove the decimal point: 10x = 8(repeating). Next, subtract the original equation from this new equation to eliminate the repeating part: 10x - x = 8(repeating) - 0.8(repeating). Simplifying these expressions gives us: 9x = 7.2. Finally, divide both sides of the equation by 9: x = 7.2/9. Therefore, the equivalent fraction form of 0.8(repeating) is 7.2/9.

Assume that the poisson distribution applies and that the mean number of hurricanes in a certain area is 5.55.5 per year.
a. find the probability​ that, in a​ year, there will be 44 hurricanes.
b. in a 5555​-year ​period, how many years are expected to have 44 ​hurricanes?
c. how does the result from part​ (b) compare to a recent period of 5555 years in which 88 years had 44 ​hurricanes? does the poisson distribution work well​ here?

Answers

We are given 
λ = mean = 5.5 hurricanes  per year 
and Poisson distribution applies.

P(k, λ ) = λ ^k * e^(- λ ) / k!

a) 4 hurricanes in a year 
P(4,5.5)=5.5^(4)*e^(-5.5)/4!
=0.1558

b) In 55 years, the expected number of years with 4 hurricanes
= 55*0.1558 = 8.57,   could be rounded to the nearest integer, 9.

c) Records show that in 55 years had 8 years had 4 hurricanes each year.
This compares very closely with the expected number 8.57.

Other Questions
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