Jamal scored 62, 75, 76, and 90 on four tests. What does he need to score on the
fifth test in order to have a mean of exactly 80?
A
80
100
0
93
97

Me because some of question i don’t understand

Find the midpoint m of z1=(8+5i) and z2=(12+3i)

Harold wrote this equation to model the level of water in a pool over time. the variable x represents time in hours. f(x) = 3,500 - 225x which statements about the situation are true? check all that apply. the water level is rising. the water level is falling. the initial level of water in the pool was 3,500 units. the initial level of water in the pool was 225 units. the pool was empty after 14 hours. the water was 2,600 units high after 4 hours.