3 years ago

Somebody help me fast This is correct?!

Mathematics

1 answer:

andrey2020 [161]3 years ago

5 0

Answer:

A.false

B.true

C.false

D.true

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The formula that relates the length of a ladder, L, that leans against a wall with distance d from the base of the wall and the

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Answer Ladder will reach the height of 14.59 feet ( to the nearest hundredths).

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If f(x)=×^2-81andg(x)

defon

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the correct choice is marked

Step-by-step explanation:

$f(x)\cdot g(x)=(x^2-81)\dfrac{x+9}{x-9}=\dfrac{(x-9)(x+9)(x+9)}{(x-9)}\\\\=\boxed{(x+9)^2}$

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Find the inverse of f(x)

FinnZ [79.3K]

Answer:

$\huge\boxed{A.\ f^{-1}(x)=\dfrac{x-3}{5}}$

Step-by-step explanation:

$f(x)=5x+3\to y=5x+3\\\\\text{exchange}\ x\ \text{with}\ y\\\\5y+3=x\\\\\text{solve for}\ y\\\\5y+3=x\qquad|\text{subtract 3 from both sides}\\\\5y+3-3=x-3\\\\5y=x-3\qquad|\text{divide both sides by 5}\\\\\dfrac{5\!\!\!\!\diagup y}{5\!\!\!\!\diagup}=\dfrac{x-3}{5}\\\\y=\dfrac{x-3}{5}\to f^{-1}(x)=\dfrac{x-3}{5}$

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