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3 years ago

F(x) = 10x - 15. What value of x makes f(x) = 75?

Mathematics

2 answers:

Tomtit [17]3 years ago

6 0

Answer:

x=9

Step-by-step explanation:

Set the function equal to 75 and solve for x.

75=10x-15

add 15 to each side

90=10x

divide each side by 10 to isolate x

9=x or x=9

likoan [24]3 years ago

3 0

Answer:

x = 9

Step-by-step explanation:

f(x) = 10x - 15

f(x) = 75

Plug in 75 for f(x)

75 = 10x - 15

add 15 from either side

90 = 10x

divide either side by 10

9 = x

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Explanation:

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Pair-4:
$log_{5}x = 4 \\ \frac{ln(x)}{ln(5)} = 4 \\ ln(x) = 4 * ln(5) \\ x = e^{4*ln(5)} \\ x = 625$

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