f-¹(x)=
Answer:
Solution given:
f(x)=
Let f(x)=y
y=
Interchanging role of x and y
x=
doing crisscrossed multiplication
x(y+7)=-2y+2
now solve it:
xy+7x=-2y+2
keep like terms in one side
xy+2y=2-7x
take common
y(x+2)=2-7x
make a value of y
y=
So,
f-¹(x)=
Y = total cost
40 = The one time fee
90 = the service charge per month
x = number of months
I’m pretty sure there are infinite solutions as the system of equations are equivalent to each other.
Answer:
She had 15 minutes left.
Step-by-step explanation:
30 - 11 = 19
19 - 4 = <em>15</em>
Answer:
r=8
Step-by-step explanation:
you divide 28 by 3 1/2 to get r=8
