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2 years ago

5) 9x + 8y = -2 -5x + 8y = 26 A) (2, 2) C) (2,-2) B) (-2,-2) D) (-2, 2)

Mathematics

2 answers:

Marina CMI [18]2 years ago

7 0

Answer:

5)9x+8y=-2

-5x+8y=26

A) (2,2)

GarryVolchara [31]2 years ago

3 0

The anwser is A :))))

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Given, the equation that represents the height of an object:

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$\begin{gathered} y(3+h)=100(3+h)-16(3+h)^2 \\ y(3+h)=300+300h-16(9+6h+h^2) \\ y(3+h)=300+300h-144-96h-16h^2 \\ y(3+h)=156+4h-16h^2 \\ y(3)=100(3)-16(3)^2=156 \end{gathered}$

Substitute y(3+h) and y(3) into the expression of the limit

$\begin{gathered} \frac{dy}{dt}|_{t=3}=\lim_{h\to a}\frac{156+4h-16h^2-156}{3+h-3}=\lim_{h\to a}\frac{4h-16h^2}{h} \\ \\ \frac{dy}{dt}|_{t=3}=\lim_{h\to a}(4-16h) \end{gathered}$

Where a = 0

d) compute the instantaneous velocity at t = 3