Answer:
20
Step-by-step explanation:
40 - 15 = 25
25/1.25=20
y-intercept is -6 (0,-6) and the x-intercept is -3 (-3,0)
74*5 = 370
370 - 65 - 70 -70 -80 = 85
So. you need to get 85 on your fifth test.