Answer:
Step-by-step explanation:
let f(x)=y
y=2x+5
flip x and y
x=2y+5
2y=x-5
y=(x-5)/2
f^{_1}(x)=(x-5)/2
but f^{-1}(x)=1
so (x-5)/2=1
x-5=2
x=2+5=7
Answer:
8
Step-by-step explanation:
9514 1404 393
Answer:
Step-by-step explanation:
The solution steps are ...
3(y -2) = 18 . . . . . . given
3y -<u>6</u> = 18 . . . . . . . eliminate parentheses using the distributive property
3y = <u>24</u> . . . . . . . . . add 6 to both sides
y = <u>8</u> . . . . . . . . . . . divide both sides by 3
The value of y is 8.
Answer:
x = -4
Step-by-step explanation:
-24 = 6x
________
Switch sides:
6x = -24
________
Divide both sides by 6:
6x/6 = -24/6
________
Simplify:
X = -4
Just distribute -5
30u+15x-20
Don’t forget to change negative signs to positive signs if their multiplied by negatives