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3 years ago

For how many days is the total cost $300? ___days Initial Value 8 Rate of Change 15

Mathematics

2 answers:

Paladinen [302]3 years ago

8 0

b=initial value=8
m=rate if change(Slope)=15

Equate

$\\ \sf\longmapsto y=mx+b$

$\\ \sf\longmapsto 300=15x+8$

$\\ \sf\longmapsto 300-8=15x$

$\\ \sf\longmapsto 292=15x$

$\\ \sf\longmapsto x=\dfrac{292}{15}$

$\\ \sf\longmapsto x=19.5$

Alona [7]3 years ago

4 0

Answer:

≈ 19.5 days

Step-by-step explanation:

Initial Value b = 8
Rate of Change m = 15

<u>Equation of the line:</u>

y = 15x + 8

15x + 8 = 300
15x = 300 - 8
15x = 292
x = 292/15
x ≈ 19.5 days

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