$8x + 5y = - 48 \\ \\ at \: x = 0 \\ \\ 8 \times 0 + 5y = - 48 \\ \\ \therefore \: 5y = - 48 \\ \\ \therefore \: y = \frac{ - 48}{5} \\ \\ \therefore \: y - intercept = - 9.6 \\ \\ at \: y = 0 \\ \\ 8 x + 5 \times 0 = - 48 \\ \\ \therefore \:8x = - 48 \\ \\ \therefore \: x = \frac{ - 48}{8} \\ \\ \therefore \: x - intercept = -6 \\ \\$

4 0

4 years ago

A long distance phone call between two cities costs $3.43 for 7 minutes. What is the rate in cents per minute?

Evgesh-ka [11]

3.43 dollars divided by 7 minutes = 0.49 cents

4 0

3 years ago

If f(x) = 4x + 8 and g(x) = (x+4,<br> what is (fºg)(12)?

svetlana [45]

Answer:

Step-by-step explanation:

$f(x) = 4x+8\\g(x) = x + 4\\\\1. f(g(x)) = 4(x+4) + 8\\2. f(g(x)) = 4x + 16 + 8\\3. f(g(x))=4x + 24\\\\4. f(g(12)) = 4(12) + 24\\5. f(g(12)) = 48 + 24 = 72\\$

To do these, you have to place the entire function inside the parent function's variables.

You are inputting the value of the function g(x) into f(x)

4 0

3 years ago