Answer:
3
Step-by-step explanation:
15x +8 =40 +13
15x + 8=53
15x=45
3
So the unit rate would just be the numbers all added up
Answer:
he can buy 30
Step-by-step explanation:
21.62 divided by .78 = 30.0277777778,you dont have enough for 31
Answer:
f^-1(x) = ( x + 6 )/4
Step-by-step explanation:
f(x) is the same as...y = 4x + 6....and then try to make x the subject of formula
y + 6 = 4x
x = (y + 6)/4....then when writing f^-1(x)...replace y with x
f^-1(x) = ( x + 6 )/4