20% because 75 is the total price and 75 over 15 is 5 and 100 divided by 5 is 20
According to above figure, the angles (8x - 20)° and (5x + 37)° are pairs of vertical opposite angles, so
This is equivalent to -1 ( 4 - 3 )
which simplified is -1
because 4-3 is 1 and 1 times -1 is -1
Hope this helps ;)
It should be B. right angle and C. complementary angles
