3 years ago

Find the inverse function? I need help.

1 answer:

6 0

Super easy. Take the function, and replace X with Y and Y with X. For example, if Y=12/x, then the inverse would be X=12/Y. Now solve for Y, so XY=12, the Y=12/x.

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Use the Distributive Property to find (z−5)(z+3).

Anastasy [175]

Consider, $(z-5)(z+3)$ . Let's say $a = z-5$ then the problem reduces to $a(z+3)=za+3a$ . (Do you understand this step?)

So then replacing a again with our definition we get, $z(z-5)+3(z-5)=z^2-5z+3z-15=z^2-2z-15$ .

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3 years ago

Austin has $5 more than Mark. If Mark has Δ dollars, write an expression for the amount of money Austin has.

pickupchik [31]

Let x be Mark's dollars... x + 5 = Austin's dollars....Brainliest?....

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3 years ago

Write 27/40 as a decimal.

Alecsey [184]

Answer:

0.675

Step-by-step explanation:

27/40

- Divide each number by 10

2.7/4

- Multiply each number by 25

67.5/100

Convert that into a decimal. :)

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2 years ago

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George spent $21.25 on five movie tickets. How much was each movie ticket?

Sunny_sXe [5.5K]

Answer:

$4.25

Step-by-step explanation:

21.25/5 = 4.25

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3 years ago

If the cost to the store is $20 and the selling price is $32 what is the markup?

nata0808 [166]

Answer:

60%

Step-by-step explanation:

It went up 12 dollars, and you need to find how much 12 is of 20 as a percent. You do 12/20 times 5/5 and get 60/100, so 60% markup

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3 years ago

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