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3 years ago

Oberon Cell Phone Company advertises service for 10 cents per minute plus a monthly fee of $35.00.

1 answer:

7 0

First, subtract the monthly fee from the October bill, which would be $52.50.
Now, divide this by $0.10.
Parker talked for 525 minutes.
Hope this helps! :)

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What is the value of 4r^2-8 when r=3?

Vlad [161]

Answer:

Step-by-step explanation:

So this means to replace the r you see in 4r^2-8 with 3.

Let's do that:

4(3)^2-8

Now to simplify this just use pemdas or a calculator:

4(9)-8 since 3^2 means 3*3=9

36-8

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3 years ago

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Which numerical expression correctly

ExtremeBDS [4]

Answer: The answer is (9+2) - 4

Step-by-step explanation:

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3 years ago

Find the domain of the function. y = <img src="https://tex.z-dn.net/?f=%5Csqrt%7Bx%7D%20%2B%201" id="TexFormula1" title

Step2247 [10]

Answer:

[0, infinity)

Step-by-step explanation:

A square root can only use positive numbers, otherwise it becomes imaginary. A function needs to be real to output real values. Therefore, the domain is everything from 0 onwards.

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3 years ago

You design the wooden picture frame and paint the front surface.

Hitman42 [59]

Answer:

a) 8x + 28
b) 68 in²

Step-by-step explanation:

Area of the frame with picture:

A = lw
A₁ = (x + 4)(x + 7) = x² + 11x + 28

Area of the picture:

A₂ = x(x + 3) = x² + 3x

Area of the wooden frame is the difference of the above values:

A₃ = A₁ - A₂
A₃ = x² + 11x + 28 - x² - 3x
= 8x + 28

When x = 5, the picture frame area is:

A₃ = 8*5 + 28 = 40 + 28 = 68 in²

4 0

2 years ago

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Rafael sold t-shirts and hats at a festival. He made a $3 profit for each t-shirt he sold. He also made a profit $45 from sellin

drek231 [11]

Answer:

Step-by-step explanation:

The total profit is $93

He made a $45 profit selling hats

The question says he only sold t-shirts and hats

Since we are solving for the amount of t-shirts sold we subtract $45 from $93 and get $48 dollars earned from t-shirts

He makes $3 per t-shirt

We divide the amount per t-shirt by the total t-shirt money earned

This looks like: 48/3

We get 16 as our answer

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3 years ago

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