Answer:
u= 0.26
Step-by-step explanation:
Answer:
-21.74Step-by-step explanation:
Solve for u by simplifying both sides of the equation, then isolating the variable.
using the line of best fit as a guide, predict the number of weeks of practice it would take for someone to type 80 words per minute.
Answer:
8 weeks
Step-by-step explanation:
Heeeeeeeeeeeeellllllllllllp
Answer:30
Step-by-step explanation:add all the sides
Emma baker 14 cookies she sold 2/7 of the cookies how many cookies did Emma sell?
PLEASE HELP!!!!!!!
Answer:
The answer is 4 cookies
*WILL GIVE BRAINLIEST*
Select all the expressions that are equal to 1,024.
A. 4x4x4x4x4
B. 5x5x5x5
C. 4 to the 5th power
D. 5 to the 4th power
E. 2 to the 10th power
Answer:
A. 4X4X4X4X4
C. 4^5
E. 2^10
Step-by-step explanation:
Answer:
A C and E
Step-by-step explanation:
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Find the common difference: -18, -23, -28, -33, ..
Answer:
5
Step-by-step explanation:
Between each number there is a change of 5 in the negative direction
Answer:
5
Step-by-step explanation:
christopher's square sandbox has 36 ft² of playing space. it was constructed using 4 boards. One of the sandbox sports needs to be replaced. what Link Board should Christopher's father cut to repair the side of the sandbox?
Answer:
6 feet
Step-by-step explanation:
The area of a square is:
a=s^2, where s is the side
We know the area is 36, so we can substitute that in
36=s^2
Take the square root of both sides
6=s
s= 6 feet
One side is 6 feet, so that is how long the board should be cut.
what do the 300 and 10 in the diagram represent
i need help fast plz
Answer:
Step-by-step explanation:
Do you have a picture of the diagram so I can see where the 300 and 10 are placed :D ?
8. Gravity is a force of attraction between objects based on their mass and their distance apart.
Why aren't other objects, like your pencil, being pulled towards you?
Answer:
Our mass is not great enough to have enough pull to actually move the pencil.
Objects like a pencil aren't noticeably pulled towards you because the gravitational force between objects with relatively small masses, like you and the pencil, is very weak compared to the Earth's gravitational pull.
The reason why other objects, like your pencil, aren't being pulled towards you is due to the relative mass of the objects and the distance between them.
Although every object with mass exerts a gravitational force on other mass objects, this force is extremely weak unless at least one of the objects is very massive, like Earth.
According to Newton's universal law of gravitation, the force between two objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.
Given that both you and the pencil have relatively small masses, the gravitational attraction between you is minuscule compared to the gravitational pull of the Earth, which is why the pencil falls to the floor when dropped instead of being pulled towards you.
What is the solution to the equation -4(2x+3) - 2x + 1-(8x + 2)?
30:00 HELP PLEASE 95 pOINTS
Answer:
-18x -13
Step-by-step explanation:
-4(2x+3) - 2x + 1-(8x + 2)
We cannot solve since there is no equals, but we can simplify
Distribute
-8x -12 -2x +1 -8x -2
Combine like terms
-8x-2x -8x -12 +1 -2
-18x -13
Answer:
-8x - 13
Step-by-step explanation:
-4(2x + 3) - 2x + 1 - (8x + 2)
-8x - 12 - 2x + 1 - 8x - 2
-18x - 13
2x^2-6x-20=0 value of a
Answer:
a = 2
Step-by-step explanation:
The equation 2x² - 6x - 20 = 0 is in standard form for a quadratic formula.
The general equation for standard form is: y = ax² + bx + c
Sometimes we make "y" => 0 when we are finding the roots (x-intercepts).
Notice "a" is attached to x² in the standard form.
In your question, the number attached to x² is 2.
∴ a = 2
Find the total volume of the following composite figure with
h=4.3
and
r=3.9
Use 3.14 for LaTeX: \piπ.
Round to the nearest hundredth.
Given:
A composite figure consisting of a cylinder with radius r and height h and a half-sphere with a radius r.
To find:
The total volume of the composite figure.
Solution:
To determine the total volume of the figure, we add the volume of the cylinder and the volume of the half-sphere.
The volume of a cylinder, [tex]V= \pi r^{2} h.[/tex]
The given cylinder has a radius of 3.9 units and a height of 4.3 units. Assume π equals 3.14.
The volume of the cylinder, [tex]V = (3.14)(3.9^{2} )(4.3)= 205.36542[/tex] cubic units.
The volume of a half-sphere, [tex]V= \frac{2}{3} \pi r^{3} .[/tex]
The given half-sphere has a radius of 3.9 units, assume π equals 3.14.
The volume of the half-sphere, [tex]V= \frac{2}{3} (3.14)(3.9^{3} ) = 124.17444[/tex] cubic units.
The total volume of the composite figure [tex]= 205.36542+124.17444=329.53986[/tex] cubic units.
Rounding this off to the nearest hundredth, we get the volume of the cone as 329.54 cubic units.
I = 7n + 50.
A- 6
B-8
C-10
D-12
We can substitute I with 120 since that's how much he made in one day.
120 = 7n + 50
~Subtract 50 to both sides
120 - 50 = 7n + 50 - 50
~Simplify
70 = 7n
~Divide 7 to both sides
70/7 = 7n/7
~Simplify
10 = n
Therefore, the saleman made 10 sales.
Best of Luck!
Factor x^2 + 5x + 4 = 0
Answer:
Step-by-step explanation:
x² + 5x + 4 =0
Product =4
Sum = 5
So, factors = 4*1
x² + 1x + 4x + 4*1 = 0
x*(x + 1) + 4*(x + 1) = 0
(x + 1)(x + 4) = 0
Which of the binomials below is a factor of this trinomial?
x² - 4x - 12
Step-by-step explanation:
x2 - 4x - 12
Finding factors of 12 then
x2 - 6x + 2x - 12
x( x - 6) + 2 (x - 6)
So the factors are (x+2) (x-6)
Answer: x- 6
Step-by-step explanation: i did it
7. You have invested $2500 in a 30-day savings certificate paying 4.15% per annum. Find the
amount of the investment at the end of 30 days.
a) $2551.88
b) $2508.53
c) $2491.50
d) $2603.75
Answer:
B) $2508.53
Step-by-step explanation:
Please refer to the attached image for explanations
HELP!!!! which system of inequalities are shown?
I believe the answer is b
Step-by-step explanation:
i think the second one maybe
Solve the equation.
- 2(x + 1) + 3x = 12
X=
Answer:
x= 14
Step-by-step explanation:
Answer:
X= 14
Step-by-step explanation:
-2X-2+3x=12
-2x-2+3x=12
x-2=12
x=12+2
x=14
A pillow that usually costs $18 is marked down 25%. Use the table to find the pillow’s new price.
Fill in the missing amounts to solve the problem.
100 percent is an 18 dollar original price, 25 percent markdown is a, and new price is B
a =
b =
Answer:
a=4.25
b=13.5
Step-by-step explanation:
so basically you just multiply 18 x 0.25 and you get 4.25 then you subtract that from 18
Answer:
4.50 ,13.50
Step-by-step explanation:
ik i hate edgunity too
What kind of angle is EOD and what is it’s measure?
Answer:
Answer:
Part 1) m∠EOD=20°
Part 2) m∠AOD=80°
Step-by-step explanation:
Part 1) Find the measure of angle EOD
we know that °
m∠EOD=m∠EOX-m∠DOX
we have
Observing the figure
m∠EOX=140°
m∠DOX=120°
substitute
m∠EOD=140°-120°=20°
Part 2) Find the measure of angle AOD
we know that °
m∠AOD=m∠DOX-m∠AOX
we have
Observing the figure
m∠AOX=40°
m∠DOX=120°
substitute
m∠AOD=120°-40°=80°
Step-by-step explanation:
Answer for brainliest !!!!! ASAP NOW REALLY EASY
Answer: I believe the answer is 14.04
Step-by-step explanation:
When you divide 3.24 into 3 it gives you 1.08 then multiply it by 13 to get 14.04
Answer:
14.04
Step-by-step explanation:
You have 3 apples. Those 3 apples cost 3.24. He also wants to buy 13 MORE. You find the answer for doing a diagram like this:
A- 3 A- 13
$- 3.24 $- ?
Step 1. Do the diagram and fill it out.
Step 2. Multiply 13 and 3.24
(You get 42.12)
Step 3. Divide the answer (42.12) by 3
(You get 14.04)
And thats how you get the answer.
Does the product of (x - 1)(x + 1) result in a perfect square trinomial? Why or why not?
Answer:
No.
Step-by-step explanation:
When you distribute the two factors it would become a perfect square binomial because the -x and the x would cancel out leaving only x^2 -1, which is the difference of two squares.
Answer:
No because the when you distribute it out it would be (x^2 -1) which is not a perfect square trinomial equation. Also it cannot be a perfect square trinomial because one binomial has negative 1 and the other has positive 1 which indicates that it is not a perfect square.
Step-by-step explanation:
Find the slope of the line that passes through (-46, -41) and (-11, -8).
Look at the attached picture⤴
Hope it will help u..
What is one example of an odd trigonometric function? Explain.
Answer:
[tex]sin(-x)[/tex]
Step-by-step explanation:
Odd functions follow the relation of
[tex]f(-x)=-f(x)[/tex]
Lets check for the most trivial value, does
[tex]sin(-0) = -sin(0)[/tex]
Well these values both equal 0, so this is correct!
What about another value?
[tex]sin(- \frac{\pi}{2})=-1\\-sin(\frac{\pi}{2})=-1[/tex]
In-fact this is strictly defined for all values of sin. Meaning that this is an odd function.
The example of an odd trigonometric function is sin(-x).
What is an odd trigonometric function?All functions that involved trig functions could be even, odd, or not. A function could be odd if f(-x) = - f(x)
So, for sin, it is
sin (-0) = -sin(0)
Since these values both equal 0, so this is right
So, here sine be the odd function and cos is an even function.
Therefore, The example of an odd trigonometric function is sin(-x).
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A streaming video company charges $27.50 to set up an account and $12 per month to
enjoy the service. If Landon paid a total price of less than $243.50 for streaming video, how
many months (m) did he use the company's service?
Answer:
18 months
Step-by-step explanation:
27.50+12x=243.50 let x represent amount of months
subtract 27.50 from both sides
12x=216 divide
18 months
The solution is 18 months
The number of months Landon used the streaming service is given by the equation x = 18 months
What is an Inequality Equation?Inequalities are the mathematical expressions in which both sides are not equal. In inequality, unlike in equations, we compare two values. The equal sign in between is replaced by less than (or less than or equal to), greater than (or greater than or equal to), or not equal to sign.
In an inequality, the two expressions are not necessarily equal which is indicated by the symbols: >, <, ≤ or ≥.
Given data ,
Let the inequality equation be represented as A
Now , the value of A is
Let the number of months be x
A streaming video company charges $27.50 to set up an account and $12 per month to enjoy the service
Let the total cost be represented as y
Landon paid a total price of less than $243.50 ,
So , the value of y = $ 243.50
The inequality equation is 12x + 27.50 < 243.50
12x + 27.50 < 243.50 be equation (1)
On simplifying the equation , we get
Subtracting 27.50 on both sides of the equation , we get
12x < 216
Divide by 12 on both sides of the equation , we get
x < 18
So , the value of x = 18 months
Hence , the number of months is 18 months
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The quadrilateral shown is a parallelogram. What is m angle B? A) 25 B) 55 C) 65 D) 115
I’ll give you best brainliest!!
The sum of the internal angle is 360 degrees. Then the measure of angle B is 115°.
What is a parallelogram?It is a polygon that has four sides. In a parallelogram, opposite sides are parallel and equal. And its diagonals intersect at mid-point.
The quadrilateral shown is a parallelogram. The angle A is 65°.
∠D and ∠B are equal because they are alternate angles.
∠A and ∠C are equal because they are alternate angles.
Then the sum of the internal angle is 360 degrees.
∠A + ∠B + ∠C + ∠D = 360
∠A + ∠B + ∠A + ∠B = 360
∠A + ∠B = 180
∠B = 180 - 65
∠B = 115
Thus, the measure of angle B is 115°.
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Sarah and Owen Hebert purchased 26 stamps, a mixture of 13 cents and 22 cents stamps. Find the number of each type of stamp if they spent $4.19.
Answer:
17 = 13 cent stamps
9 = 22 cent stamps
Step-by-step explanation:
Here is what we know:
a = 13 cent stamps
b = 22 cent stamps
Total stamps: 26
Total cost $4.19
Now we make equations based on what we know.
a + b = 26
13a + 22b = 419
Now we have to change the first equation so we can solve for the second. To do this, we have to find a similar factor for one of the variables. Let's change a.
Multiply the first equation by 13
13(a + b) = 13(26)
13a + 13b = 338
Now we put the two equations together and subtract. (Don't forget to change all the signs when you subtract)
13a + 22b = 419
- 13a - 13b = - 338
= 0 + 9b = 81
Solve for b.
9b = 81
b = 9
Plug b into the first equation to get a.
a + b = 26
a + 9 = 26
a = 17
17 = 13 cent stamps
9 = 22 cent stamps
You are done!
Hope this helped! :)
The number of each type of spend should be
17 = 13 cent stamps
9 = 22 cent stamps
Given that,
a = 13 cent stamps b = 22 cent stamps Total stamps: 26 Total cost $4.19Based on the above information, the calculation is as follows:
a + b = 26
13a + 22b = 419
Multiply the first equation by 13
13(a + b) = 13(26)
13a + 13b = 338
13a + 22b = 419
0 + 9b = 81
9b = 81
b = 9
Plug b into the first equation to get a.
a + b = 26
a + 9 = 26
a = 17
So,
17 = 13 cent stamps
9 = 22 cent stamps
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Parrots can develop cognitive issues as they get older. This may compromise their memory, ability to learn,
awareness, sight, and hearing. A researcher wishes to conduct a study to find which of two medicines,
Medicine A or Medicine B, is more effective in improving cognitive health. A total of 150 parrots that are at
least 12 years old will be randomly selected from sanctuaries around the United States. The researcher will
get consent from all owners, treat the parrots for 1 year, and evaluate changes in cognitive health.
Part A: How would the study benefit from adding a control group? (2 points)
Part B: What is the best way to randomly place the parrots into the Medicine A, Medicine B, and control
groups? (4 points)
Part C: The researcher wants to use a blocking variable to place the parrots into groups instead of doing it randomly. He decides to block either by breed or sanctuary. Explain which would be the best blocking
method. (4 points)
Part A:
This would aid throughout the comparison, since it could be used to examine the consequences of the medicines on some kind of collection of parrots, as well as the lack of either treatment.
Part B:
"Random sampling" would be the best way to randomly place the parrots.
Part C:
The best blocking method would be "Breed".
Therefore we know that a blocking variable should be consistent and unchangeable. The parrots in some kind of a sanctuary might fluctuate in breed as well as quantity, and certain other considerations like as upkeep by the government may have an impact somewhere on parrots' circumstances.Thus the response above is correct.
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A control group is beneficial as a comparison reference to isolate the effects of the treatments. Parrots should be randomly assigned to avoid selection bias. Blocking by parrot breed would likely be more effective than by sanctuary, because breed potentially has a greater influence on cognitive health.
Explanation:Part A: Control Group
The inclusion of a control group provides a reference point for comparison and helps to identify the effects of the medicines by isolating other variables. Without a control group, it would be challenging to discern whether the observed improvements in the parrots' cognitive health were solely due to the medicines or external factors.
Part B: Random Placement
The best way to randomly place the parrots into the three groups is by using a random number generator or similar method to ensure equal and unbiased chance of being allocated to any group. This would mitigate any potential bias and ensure the findings are due to the effect of the Medicines and not the selection process.
Part C: Blocking Method
Blocking by breed might be more beneficial as biological differences among breeds could influence cognitive health and the response to medication. Blocking by sanctuary would be less ideal as cognitive health could be influenced by a variety of situational factors, such as diet and care, which could introduce bias in the results.
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Which expression is equivalent to the following expression? 2(x + 7)
a. 2x + 7
b. 2x + 9
c. 2x + 14
d. x + 14
Answer:
C
Step-by-step explanation:
Use distributive property. distribute the 2 into both numbers by multiplying them both by 2 and you get 2x + 14
Answer:
I believe the answer is (C) 2x+14.
You have to distribute the 2 and multiply it to the x and the 14.
Step-by-step explanation:
Multiply the x by the 2 to get 2x
multiply the 7 by the 2 to get 14
so the equation is: 2x + 14
I hope this is correct.
Help! Will give brainliest and 5 stars rating and thanks
solve:
l -4 +2x l -3 > 9
Please note that l and l is inequalities signs
Solve and graph (graphing on number line is optional)
Answer:
x < -4 or x > 8
On a number line, make two arrows:
1) going towards left from -4 with an open circle at -4
2) going towards right from 8 with an open circle at 8
Step-by-step explanation:
l -4 +2x l -3 > 9
l -4 +2x l > 12
l 2x - 4 l > 12
2x - 4 > 12
2x > 16
x > 8
-2x + 4 > 12
-2x > 8
x < -4
On a number line, make two arrows:
1) going towards left from -4 with an open circle at -4
2) going towards right from 8 with an open circle at 8
Answer:
see below
Step-by-step explanation:
l -4 +2x l -3 > 9
Add 3 to each side
l -4 +2x l -3+3 > 9+3
l -4 +2x l > 12
We Separate into two inequalities, remembering to flip the negative inequality
-4+2x>12 or -4+2x<-12
Add 4 to each side
-4+4+2x>12+4 or -4+4+2x<-12 +4
2x> 16 or 2x< -8
Divide each side by 2
2x/2 > 16/2 or 2x/2 < -8/2
x > 8 or x < -4
To graph we have open circles at 8 going to the right and at -4 going to the left