ah A trough is 12 feet long and 3 feet across the top. Its ends are isosceles triangles with altitudes of 3 eet. If water is being pumped into the trough at 2 cubic feet per minute, how fast is the water level sing when the water is 1 foot deep

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step-by-step explanation:

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2 equivalent expressions to represent the area of a rectangle and the top is n-3 and the side is 2

area of the rectangle = length * width

given length = n - 3

width = 2

replace it in the area

so area of the rectangle = (n-3) *2

= 2(n-3)

one of the expression is 2(n-3)

to get another expression we distribute 2 inside the parenthesis

2(n-3) is 2n - 6

so another expression is 2n - 6

two equivalent expression are

2(n - 3)   , 2n - 6

the answer is 25 because they're both the same