15 + 45
GCF = 15
15/15 = 1
45/15 = 3
(15 * 1) + (15 * 3) =
15(1 + 3) <===
N×-17+5
I believe this is right.
The inside angle where that is not labelled you can find as angles on a straight line = 180°. From this you can find that the angle is 180-40=140°. This shape is a pentagon so the sum of the interior angles is 180(5-2)=540°. So this means 68+124+76+140+x=540. Rearrange for x to get x=132°.
