MATHEMATICS MIDDLE SCHOOL

3a + b to the second power

Answers

Answer 1

Answer:

Answer:

9a^2 + b^2

Step-by-step explanation:

(3a + b)^2

9a^2 + b^2

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X(4x + 1)Please help
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Explain howto use partial quotients to divide 235 by 5

Answers

I showed you how to do it

78 is 15% of what #? 1. | 3x - 2 | = 8 and | x + 1 | = 1
What value of x satisfies both equations above?
1. -1
2. 2
3. 1
4. -2

What is the slope of the line described by the 3y - 4x + 5 = 0 equation?
1. 4/3
2. -5/3
3. 5/4
4. 3/4

Please help.. Show work for ALL problems please.

Answers

1. 78 = 0.15x
78 / 0.15 = x
520 = x.....so 78 is 15% of 520

2. | 3x - 2 | = 8 | x + 1 | = 1

3x - 2 = 8 -(3x - 2) = 8 x + 1 = 1 -(x + 1) = 1
3x = 8 + 2 -3x + 2 = 8 x = 1 - 1 -x - 1 = 1
3x = 10 -3x = 6 x = 0 -x = 2
x = 10/3 x = -2 x = -2

ur answer is : x = -2

3. 3y - 4x + 5 = 0
3y = 4x - 5
y = 4/3x - 5/3
slope = 4/3

If x = 11 and y = 7, what is the value of the following expression?
x - 8 + 4y

Answers

I think it is 31 I might be wrong but I tried :)

If you change the x with the 11 and the y with 7, you subtract the 8 from 11, than add 4 times 7. And you get 31

Kenneth drove 184.25 miles in 3 7/20 hours. What was his average speed

Answers

To solve this problem, all you have to do is set up a proportion, letting x represent Kenneth's average speed per hour.

184.25/3.35 = x/1

Now, we use cross products, or the multiplication of the numerator of one fraction times the denominator of another fraction, and setting them equal to one another.

3.35x=184.25

Finally, we divide both sides by 3.35, because it's the coefficient of x, and we are trying to get the variable x alone.

x=55

Therefore, Kenneth's average speed was 55 miles per hour.

A submarine is at 756 feet.How many feet will it need to rise to be at the suface

Answers

It needs to rise 756 feet...

0 is at the surface.... The submarine is 756 feet down. So, to get to the surface it needs to go up 756 to reach 0.

Its simple intigers its -756 so to go to 0 witch is surface it needs to add or rise 756 to rise to surface

Which of the following fraction is also a repeating decimal?A. 7/14
B. 3/12
C. 10/16
D. 5/15

Answers

Answer:

Step-by-step explanation:

A dicimal sign is the same thing as a division sign, so if I do 7 divided by 14 it would be 0.5 if I do 3 divided by 12 it would be 0.25 if I do 10 divided by 16 it would be 0.625 and if I do 5 divided by 15 it would be 0.333333333.

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