PLS HELPPPPPP ME!!! ASAP
1 answer:
Answer:
2.5
Step-by-step explanation:
<em>Let x be the number of hours both people baby sit and y be the number of hours that they each earn. </em>
<u>Sarah: </u>
y = 10 + 2.5x
<u>Carly: </u>
y = 7.5 + 3.5x
<em>You know that the number of hours should be the same (y). </em>
10 + 2.5x = 7.5 + 3.5x
<em>Evaluate and find x. </em>
10 - 7.5 = 3.5x - 2.5x
x = 2.5
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x = 19, y = 1
Step-by-step explanation:
f(x) = 5(x + 4) - 6
y = 5(x + 4) - 6
inverse function:
switch x and y
x = 5(y + 4) - 6
solve for y
x = 5y + 20 - 6
x = 5y + 14
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-5y = -x + 14
y = (-x + 14)/-5
y = 1/5x - 2.8
plug 19 in for x
y = 1/5(19) - 2.8
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