I guess it is simplifying the expression:

Answer:
b
20
10
Step-by-step explanation:
17
as in right angle one has to be 90 degree others sum should be equal to 90
so if 3x+6 and 2x-1 are smaller angle their sum should add up to 90
3x+6+2x-1=90
x=17
answer is 2x-1 is smallest=33°
Answer:
y = 7x - 33
Step-by-step explanation:
Using a given point and slope, we need to use point-slope form.

m= 7 (slope)
= 3 (x value from given point)
= -12 (y value from given point)
Now we Substitute values in
Double negative with - (-12) makes 12 positive
Use distributive property for 7(x -3)
Subtract 12 from both sides