Three consecutive numbers added form 69. What is the third number?

1 answer:

8 0

SOLUTION:

Let third number of three numbers = x

x + x - 1 + x - 2 = 69

3x - 3 = 69

3x = 69 + 3

3x = 72

x = 72 / 3

x = 24

FINAL ANSWER:

Therefore, the third number is 24.

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Lisa [10]

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Under this assumption, we square both sides and we have

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A fence must be built to enclose a rectangular area of 20,000 ft^2. Fencing material costs $4 per foot for the two sides facing

Marysya12 [62]

The cost of the least expensive fence is $3200

Step-by-step explanation:

The given is:

A fence must be built to enclose a rectangular area of 20,000 ft²
Fencing material costs $4 per foot for the two sides facing north and south and $8 per foot for the other two sides

We need to find the cost of the least expensive fence

Assume that the length of each side opposite to North or South is x feet and the length of each other sides is y feet

∵ The length of the rectangle = x feet

∵ The width of the rectangle = y feet

∵ The rectangular area is 20,000 ft²

- Area of a rectangle = length × width

∴ x × y = 20,000

- Divide both sides by x to find y in terms of x

∴ $y=\frac{20,000}{x}$