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drek231 [11]
2 years ago
13

Jaime is 2 years older than Alejandra. In 5 years the sum of their ages will be 80. How old is Jaime now?

Mathematics
1 answer:
Dima020 [189]2 years ago
7 0

Answer:

20 age This is right answer

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Brian visited a mountain park with trails for hiking, mountain biking, horseback riding, and cross-country skiing. The chart sho
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2 years ago
A rectangle has a perimeter of 30 ft. Find a function that models its area A in terms of the length x of one of its sides. What
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Step-by-step explanation:

Let the other side of the rectangle be y. The perimeter of the rectangle is expressed as P = 2(x+y)

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30 = 2(x+y)

x+y = 15

y = 15-x

Also since the area of the rectangle is xy;

A = xy

Substitute y = 15-x into the area;

A = x(15-x)

A = 15x-x²

The function that models its area A in terms of the length x of one of its sides is A = 15x-x²

The side of length x yields the greatest area when dA/dx = 0

dA/dx = 15-2x

15-2x = 0

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x = -15/-2

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Hence the side length, x that yields the greatest area is 7.5ft.

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y = 15-7.5

y = 7.5

Area of the rectangle = 7.5*7.5

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