You start with a number. Double it. Square the answer. You get 400. What number did you start with?

Answers

Answer 1

Answer: 10x2 = 20
20^2 = 400
So the answer is 10

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Positive numbers have negative square roots.

A. True
B. False

Answers

True............. I think

How do you create an equation that represents a proportional table?

Answers

All you have to do is find the what happens to the x and then do f(x) = whatever function that makes y

Somestudents were asked how many pens they were carrying in theirbackpacks. The data is given in this frequency table. What is the meannumber of pens carried by these students in their backpacks?
Pens Frequency
0 4
1 5
2 8
3 4
4 3
5 1
A.2
B.3.5
C.4
D.5.5

Answers

The value of the mean of given data of pens is 4.

Add all of the numbers on the right and then divide by five.

Pens Frequency

0 4

1 5

2 8

3 4

4 3

5 1

What is the mean of the data?

The mean (average) of a data set is found by adding all numbers in the data set and then dividing by the number of values in the set.

$=(0+1+2+3+4+5)/(5)\n =(20)/(5) \n=4$

Therefore the value of the mean of pens is 4.

To learn more about the mean visit:

brainly.com/question/20118982

#SPJ2

The answer is c. Add all of the numbers on the right and then devide by five. Thd answer is C.

How to solve -6x + 3 = 4x + 11

Answers

Add 6 on both sides

-6x + 6x + 3 = 4x + 6x + 11
3 = 10x + 11

Subtract 11 on both sides

3 - 11 = 10x + 11 - 11
-8 = 10x

Divide by 10 on both sides

-8/10 = 10x/10
-8/10 = x

Simplify

x = -8/10
x = -4/5
x = -0.8

Add 6x to both sides

3 = 10x + 11

Subtract 11 on both sides

-8 = 10x

Divide by 10 on both sides

x = -8/10 = -4/5

An elevator starts on the 100th floor. It descends 4 floors every 10 seconds. At what floor will the elevator be 60 seconds after it starts?

Answers

so is 4 floors / 10 seconds
If you have 60 seconds you can multiple 10 by 6 because 10×6=60
so you also have to multiple 4 by 6
4×6=24
and because it's descending it's 100-24= 76

It would be at the 76th floor because 10 seconds times 6 seconds is equivalent to 60 seconds. So you would also multiply the 4 floors by 6 to get 24. You would finally subtract 100 an 24 to get the 76th floor. Hopes this makes sense, and I hoped this helped!

Select all the equations equivalent to 3x+5(-4x+12)-(x-3) A. -18x+63 B. 18x-63 C. 3x-20x+60-x+3 D. 3x+20x+60-x-3 PLEASE help the paper is due tomorrow mourning and i have a lot more to do!

Answers

A is an answer C is an answer

A. -18x+63
C. 3x-20x+60-x+3
Are your correct answers because they are equivalent to
3x+5(-4x+12)-(x-3).

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