MATHEMATICS HIGH SCHOOL

The solid surface area is equal to the solid volume. Find the value of x? The measurements of the rectangular prism is 9 inches long and 4 inches wide. Height is not listed. socratic.org

Answers

Answer 1

Answer:

Answer:

$x=7.2$

Step-by-step explanation:

Let x represent height of the prism.

We know that volume of rectangular is equal to product of its height, width and length.

$\text{Surface area of rectangular prism}=2(wl+lh+hw)$ , where w, h and l represents width, length and height respectively.

We have been given that the surface area of rectangular prism is equal to the volume of the prism. So we can set an equation as:

$lwh=2(wl+lh+hw)$

We are also told that the measurements of the rectangular prism is 9 inches long and 4 inches wide. Upon substituting these values in above equation, we will get:

$9\cdot 4\cdot x=2(4\cdot 9+9\cdot x+x\cdot 4)$

Let us solve for x.

$36x=2(36+9x+4x)$

$36x=2(36+13x)$

$36x=72+26x$

$36x-26x=72+26x-26x$

$10x=72$

$x=(72)/(10)\n\nx=7.2$

Therefore, the value of x is 7.2 inches.

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Solve this problem.Five times a number z is greater than or equal to 60. Find z.

Select the correct answer.

a)z greater than or equal to 5
b)z greater than or equal to 15
c)z greater than or equal to 14
d)z greater than or equal to 12

Answers

5z>=60 divide by 5 on both sides
z>=12 So D is the correct answer

I hope this helps you

A train travels 25 miles in 20 minutes. What is the train speed in miles per hour?

Answers

60 min = 1 hour

1st we need to know how many times 20 goes in 60 so we will divide.

60 ÷ 20 = 3

Now we will multiply to find the trains speed in miles per hour.

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SO, the train travels 75 miles per hour.

Hope I helped ya!!

How to solve 2/4 of 4

Answers

2/4 simplified is 1/2
1/2 of 4 = 4/2
4/2 simplifies to 2/1
2/1 is 2
2

4 can be written as 4/1.
Now multiply 2/4 * 4/1 = 8/4
8/4 can be reduced by 4
8/4 = 2
4/4=1
So u have 2/1 = 2

Copy and complete plss

Answers

Answer:

Step-by-step explanation:

to find increased percent

increase amount = $70 - $40

=$30

increase percent = increase amount /original amount *100%

=30/40 *100%

=3000/40

=75%

to find decrease percent

decrease amount = $70 - $40

=$30

decrease percent = decrease amount /original amount *100%

=30/70 *100%

=3000/70

=42.85 %

Translate the verbal phrase into an inequality. All real numbers that are greater than or equal to -1.5 and less than 9.2

Answers

Answer: -1.5 ≤ x < 9.2

Step-by-step explanation:

Hi, to answer this question we have to analyze the information given:

"All real numbers": we will use the variable x to represent all the real numbers.

"All real numbers that are greater than or equal to -1.5". This means that x is greater or equal (≤) to the number 1.5.

"And less than 9.2": less is represented with the symbol <

Mathematically speaking:

-1.5 ≤ x < 9.2

Feel free to ask for more if needed or if you did not understand something.

4 is because it is greater and less than

Which statement is not always true about irrational numbers

Answers

"Irrational numbers start with 37.2 ."

If this is not one of the statements on the list of choices that comes
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Answer:

here are the statements I need help on this too help for iready!!!

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