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olga2289 [7]
3 years ago
7

What is the height of a rectangular prism that has a volume of 280 cubic meters,a length of 8 meters, and a width of 7 meters? S

how how you found your answer.
Mathematics
1 answer:
lyudmila [28]3 years ago
8 0
When looking at a rectangular prism, we know that Volume = length * width * height

If we are given that the volume of the prism is 280 cubic meters (m^3), the length is 8 meters, and the width is 7 meters, we can fill in our equation.

280 = 8 * 7 * height
280 = 56 * height

Because we are solving for the height, we divide both sides by 56

280/56 = height

height = 5 meters

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a rectangle has a side length 2x+9 and side width x. If the perimeter is 36 cm, what is the value of x?
alukav5142 [94]
2(2x + 9) + 2(x) = 36

4x + 18 + 2x = 36

Combine like terms.

6x + 18 = 36

Subtract 18 from both sides.

6x = 18

Divide 6 on both sides.

x = 3

Hope this helps!
6 0
3 years ago
Solve for x<br><br> 2(x-3)+5=4-7(2x-1)<br><br> A. -1/10<br> B. 3/4<br> C. 1/2<br> D. 1/16
Stolb23 [73]
Hello 
<span>2(x-3)+5=4-7(2x-1)
2x-6+5 = 4 -14x+7
2x+14x =6-5+4+7
16x=12
x=12/16
x=(4×3)/(4×4)
x=3/4 (simplified by 4)
answer B</span>
6 0
3 years ago
Read 2 more answers
Question
puteri [66]

Answer:

The salt concentration of the mixed solution = 10%

Step-by-step explanation:

First assuming that the concentration of salt given is on a vol% basis.

First solution has 0.7 gallon of 5% salt

Amount of salt in this solution = 5% × 0.7 = 0.035 gallon

Second solution has 0.3 gallon of 22% salt

Amount of salt in this solution = 22% × 0.3 = 0.066 gallon

Total amount of salt in the resulting solution = 0.035 + 0.066 = 0.101 gallon

Total volume of the resulting solution = 0.7 + 0.3 = 1.00 gallon

Concentration of the mixture of salt = (0.101/1) = 0.101 = 10.1% = 10% to the nearest percent

Hope this Helps!!!

3 0
3 years ago
X-2/5=7 x=. Write answer in simplest form
Verdich [7]
X= — 1
—
15
This may be the answer
8 0
3 years ago
Then p=3.<br> Use the equation k = 3n to find the value of k when n = 3.
Bad White [126]

Answer:

k = 9

Step-by-step explanation:

n = 3, so substitute 3 for n in the equation

k = 3(3)

k = 9

6 0
3 years ago
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