Answer:

Step-by-step explanation:
In this case, the <em>y-intercept</em><em> </em>and <em>rate</em><em> </em><em>of</em><em> </em><em>change</em><em> </em>[<em>slope</em>] are given to us, so just put it in Slope-Intercept Form:

If you want it in <em>Standard Form</em>:
y = 4x - 21
- 4x - 4x
_________

I am joyous to assist you anytime.
Answer:
Step-by-step explanation:
(f o g)(7) = f(g(7))
but g(7) = 7-4 =3
(f o g)(7) = f(g(7)) = f(3) = 3² =9
Answer:
Julio's number is 40.
Step-by-step explanation:
Solve:
(x - 19) * (-7) = -147
-7x + 133 = -147
-7x = -280
x = 40
Check:
40 - 19 = 21
21 * (-7) = -147
Dang if not digit is used more than once then i go with 720 :)