The first two pairs.. just substitute the x-coordinate and find y
Given function: f(x) = (3x+5)/7
y = f(x) so it's the same as y = (3x+5)/7
Swap every copy of x and y to get x = (3y+5)/7
Solve for y to get....
x = (3y+5)/7
7x = 7*(3y+5)/7
7x = 3y+5
7x-5 = 3y+5-5
7x-5 = 3y
3y = 7x-5
3y/3 = (7x-5)/3
y = (7x-5)/3
So the inverse function is f^(-1)(x) = (7x-5)/3
Answer is choice A
Answer:
44
Step-by-step explanation:
fx=6(8)-4
fx=48-4
fx=44
Answer: Danny can make 15 sundaes from 11 1/4 cups of chocolate
Step-by-step explanation:
number of cups of chocolate syrup= 11 1/4 cups
For ever sundae, he decides to make, it will require 3/4 cup of chocolate
Number of sundae , Danny can make = number of cups of chocolate syrup /3/4 cup of sundae
= 11 1/4 / 3/4
45/4 x 4/3= 15 sundaes
Therefore, Danny can make 15 sundaes from 11 1/4 cups of chocolate
