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4 years ago

7

Four equivalent expressions for 90+21

1 answer:

Kobotan [32]4 years ago

3 0

All of the expressions must equal 111.

So it could be 91 + 20, 68 + 43, 45 + 66, 75 + 36, etc.

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Rick is buying a t-shirt and a sweater.The sweater costs 3 times as much as the t-shirt.The cost of the sweater is 27$. How much

Sergio039 [100]

Answer:

9$

Step-by-step explanation:

The way you undo multiplication is division. If the sweater costs 27$, you divide that by 3 to get a third of the cost.

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4 years ago

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Yuliya22 [10]

Answer:

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3 years ago

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Use the cross products property to solve the proportion 10/7 equals 8 / K what does k equal

Ivanshal [37]

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Step-by-step explanation:

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3 years ago

What is the inverse of the function below? f(x) = 5x - 2

kupik [55]

Answer:

B. f -1(x) = x + 2 / 5

$f^{-1}(x)=\frac{x+2}{5}$

Step-by-step explanation:

To find the inverse of a function we need to interchange x and y an solve for y.

Since $f(x)=y$ , then

$f(x)=5x-2$

$y=5x-2$

$x=5y-2$

Add 2 to both sides

$x+2=5y-2+2$

$x+2=5y$

Divide both sides by 5

$\frac{x+2}{5}=\frac{5y}{5}$

$\frac{x+2}{5}=y$

$y=\frac{x+2}{5}$

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We can conclude that the correct answer is B. f -1(x) = x + 2 / 5

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3 years ago

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Step-by-step explanation:

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