If the function f(x)=mx+b has an inverse function, which statement must be true

The things we know that are true based on this is that m does not equal 0 and the inverse function is f(x) = .

We know that the slope is not 0, because there is no inverse function if this is the case.

Secondly, we can find the inverse function by switching f(x) and x and solving for the new f(x). The work for this is below.

f(x) = mx + b ----> switch f(x) and x

x = mf(x) + b ----> subtract b

x - b = mf(x) ----> divide by m

f(x) = .

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.