MATHEMATICS MIDDLE SCHOOL

Write the equation and solve: eight more than the sum of a number and 5 is 20

Answers

Answer 1

Answer:

Greetings!

You can solve this with a simple equation:

Take the letter x to be the unknown number:

20 = 8+ (X + 5)

Then you can move the 8 + to the opposite side making it a negative 8:

20-8 = X + 5

12 = X + 5

Move the +5 over to the other side, making it a negative 5:

12 - 5 = x

7 = x

So the value of x is 7.

Hope this helps!

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Two cars drive from town A to town B at constant speeds.the blue car travel 35 miles per hour, and the red car travels 70 miles per hour. the blue car leaves at 10:30, and the red car leaves at noon. the distance between the two towns is 140 miles. which linear equations represents the red car and the blue car? a)red car y=70x
blue car y=35x+52.5

b)red car y=35x
blue car y=70x

c)red car y=70x
blue car y=35x

d) red car y=70x+105
blue car y=35x

Answers

ok so for the red car it should ahave at least y=70x and blue is y=35x at least

cross out answer B

the blue car had a head start so cross out answer that has no headstart for blue

cross out answers C and D

only one left is A
answer is A (the 52.5 is a result of multiplying 35 by 1.5 hours)

answer is A

the total volume of a cube is 360 inches to the third power how do you write 2 different possible sets of diminsions for the cube

Answers

If it's really a cube, then it can have only one set of dimensions.
Actually, only one dimension ... the length of every edge is the
same number.

The volume of a cube is the cube of its edge length. So the
length of every edge is the cube root of its volume.

But the dimension can sometimes be written in different ways.

Volume = 360 inch³

Edge length = ∛(360 inch³)

      = ∛360 inches

      = 3 ∛(13 and 1/3) inches

      = 4 ∛5.625 inches

      = 5 ∛2.88    inches

    = 6 ∛(1 and 2/3) inches .

Well,

Since it's a cube, there will only be one real dimension, and that will be the cube root of 360.

$\sqrt[3]{360} = 2\sqrt[3]{45}\ inches$

The only way to write different dimensions is to write using different units.

12 in. = 1 ft.

$\frac{2\sqrt[3]{45}}{12} = \frac{\sqrt[3]{45}}{6}\ feet$

When solving the equation 2/3 b 5 = 7, you should first ? from both sides. Then you should multiply both sides by the ? of ?. Your answer will be ? .

Answers

Depends on the question...

If your question is 2/3b + 5 = 7, then follow this one
$(2)/(3)b + 5 = 7\n\n\sf You~ first~subtract~ 5 ~on ~both~ sides\n\nThen ~you~multiply~by~(3)/(2)~on~both~sides.\n\n So...\n\n (2)/(3)b + 5 - 5 = 7 - 5\n\n(2)/(3)b = 2\n\n(2)/(3)b * (3)/(2) = 2 * (3)/(2)\n\nb = 3$
Your final answer will be b = 3

If your question is 2/3b - 5 = 7, then follow this one
$(2)/(3)b - 5 = 7\n\n\sf You~ first~add~ 5 ~on ~both~ sides\n\nThen ~you~multiply~by~(3)/(2)~on~both~sides.\n\n So...\n\n (2)/(3)b - 5 + 5 = 7+5 \n\n(2)/(3)b = 12\n\n(2)/(3)b * (3)/(2) = 12 * (3)/(2)\n\nb =18$
Your final answer will be b = 18

I'll mark brainlist for this I promise!!!!You just have to answer the following questions

Answers

Answer:1. =36 2.= 2 3.=b

Step-by-step explanation:

the last one with the picture

Negative four ninths minus two fifteenths'

Answers

$negative \ four \ ninths \to -(4)/(9) \n\n two \ fiftheenths \to(2)/(15) \n\n -(4)/(9)^((5)-(2)/(15)^((3)= \n\n =-(20)/(45)-(6)/(45)= \n\n =\boxed{-(26)/(45)}$

What is 3/8 times 2/9? Answers: A 5/17 B 5/12 C 1/17 D 1/12

Answers

$(3)/(8)\cdot(2)/(9)=(1)/(4)\cdot(1)/(3)=(1)/(12)\n\nAnswer:D$

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