3*4=12
2x*4=8x
So,answer is 8x+12
Answer:

Step-by-step explanation:
we know that
The inscribed angle is half that of the arc it comprises.
step 1
Find the measure of the arc PQR
![109^o=\frac{1}{2}[arc\ PQR]](https://tex.z-dn.net/?f=109%5Eo%3D%5Cfrac%7B1%7D%7B2%7D%5Barc%5C%20PQR%5D)

step 2
Find the measure of arc QR

we have


substitute


step 3
Find the measure of the arc QRF
![112^o=\frac{1}{2}[arc\ QRF]](https://tex.z-dn.net/?f=112%5Eo%3D%5Cfrac%7B1%7D%7B2%7D%5Barc%5C%20QRF%5D)

step 4
Find the measure of arc RF

we have


substitute


Answer:
800 is 88.89% of 900
Step-by-step explanation:
Answer:
f^-1(x) = (x + 4) / -5
Step-by-step explanation:
f(x) = -5x - 4 Substitute f(x) with y
y = -5x - 4 Switch the x and y variables
x = -5y - 4 Solve it down
x + 4 = -5y
y = (x + 4)/ -5
f^-1(x) = (x + 4) / -5 <----- This is the answer