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maddy3lizabeth
30.11.2020 •
Mathematics
A square plot of land will be fully used for a square swimming pool with a 5 foot wide walkway around it. The area of the entire plot, including the walkway, is A square feet. Which expression gives the length of the pool?
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Ответ:
The expression that gives the length of the pool is
- 5
Step-by-step explanation:
Assume that the length of the pool is x feet
∵ The length of the pool is x feet
∵ The wide of the walkway around the pool is 5 feet
∴ The total length of the pool with the walkway = (x + 5) feet
∵ The area of the entire plot, including the walkway, is A square feet
∴ The area of the entire plot, including the walkway = A feet²
∵ The area of the square = (length)²
→ Substitute the length by (x + 5)
∴ The area of the entire plot, including the walkway = (x + 5)² feet²
→ Equate it by A
∴ A = (x + 5)²
→ To find x take square root for both sides
∵
= ![\sqrt{(x+5)^{2}}](/tpl/images/0933/4102/2a7ed.png)
→ Cancel the square root of the right side by power 2
∴
= x + 5
→ Subtract 5 from both sides
∵
- 5 = x + 5 - 5
∴
- 5 = x
→ x represents the length of the pool
∴ The length of the pool is
- 5 feet
∴ The expression that gives the length of the pool is
- 5
Ответ:
574649 divided by 58 is 9907.74
Step-by-step explanation: