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3 years ago

The function Ald) = 0.45d + 180 models the amount A, in dollars, that Terry's company pays him based on

Mathematics

1 answer:

Solnce55 [7]3 years ago

7 0

Answer: Choice A) $0.45

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Explanation:

Plug in d = 0 and you'll have A(d) = 0.45d+180 turn into A(0) = 180. This says that Terry is paid $180 even if he doesnt travel a single mile.

Now plug in d = 1. You should get A(1) = 180.45 as the result.

Subtract the results: 180.45 - 180 = 0.45

He has earned 45 cents or 0.45 dollars for traveling one mile

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A shortcut is to notice that the slope of the line is 0.45

It might help to view A(d) = 0.45d+180 as y = 0.45x+180. We see that the equation is in slope intercept form y = mx+b

m = slope = 0.45 tells us how much additional dollars Terry earns for each additional mile traveled

b = 180 = y intercept = starting amount of money Terry is paid, this amount does not change based on how many miles he travels.

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P=2L+2W
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3 years ago

How much would $500 invested at 9% interest compounded annually be

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Answer:

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3 years ago

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3 years ago

What is 3x+2y=-13 3x+4y=1

Zepler [3.9K]

Answer:

The values are

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Step-by-step explanation:

3x + 2y = -13 --------eqn 1

3x + 4y = 1-------------eqn2

Using eqn 2 to get the value of y

3x + 4y = 1

4y = 1 - 3x

Dividing both sides by 4,to get y

4y/4 =( 1 -3x) / 4

y = (1 - 3x) / 4

Since we've gotten the value for y, substitute the value into eqn 1

3x + 2y = -13

3x + 2(3x - 1)/4 = -13

Opening the bracket

3x + (6x - 2)/4 = -13

LCM = 4

(12x + 6x - 2) / 4 = -13

18x - 2 / 4 = -13

Then we cross multiply

18x - 2 = -13 * 4

18x - 2 = - 52

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18x = -50

Divide both sides by 18, to get the value of x

18x/18 = -50/18

x = -25/9

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Make y the subject of the formula

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y = 84/9 / 1/4

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