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dimulka [17.4K]
3 years ago
14

PRE-ALGEBRA HELP PLEASE!

Mathematics
2 answers:
Kitty [74]3 years ago
8 0

The slope is -30/1 or -30

The equation is y = -30x + 150

Colt1911 [192]3 years ago
7 0

<span><span>PART A) the initial value of the function is 150 at 0 weeks, that means that there are still 150 songs to be downloaded at the beginning.
</span> The rate of change is -30 songs each week, that is because the amount of songs left to be downloaded decrease by 30 each week.</span>

<span><span>PART B:
</span><span> lets use 2 points of the graph p1(0, 150), p2(1, 120)
calculate the slope:
m = (y2- y1)/(x2 - x1) = (120 - 150)/(1 - 0)
m = -30
and now use line equation in form point-slope:
y - y1 = m(x - x1)
y - 150 = -30(x - 0)
y = -30x + 150</span></span>

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(3,−1) (4,7)

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A van travels 150 miles on 6 gallons of gas. How many gallons will it need to travel 325 miles?
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4. Determine whether f(x) = 1/3x + 5 and g(x) = 3x - 15 are inverse functions.
Ierofanga [76]

Answer:

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Step-by-step explanation:

Given

Given that the function f(x) and g(x) are inverse functions.

f\left(x\right)\:=\:\frac{1}{3}x\:+\:5

g(x) = 3x - 15

To determine

Let us determine whether f(x) = 1/3x + 5 and g(x) = 3x - 15 are inverse functions.

<u>Determining the inverse function of f(x) </u>

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x=\frac{1}{3}y+5

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YES! we conclude that f(x) = 1/3x + 5 and g(x) = 3x - 15 are inverse functions.

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