Question

Steve has these scores on the exams for this semester: 89, 92, and 87. What score will he have to get on the fourth exam to have a final average of at least 90%?
1)98% or better
2)96% or better
3)92% or better
4)90% or better

Answer 1

3

Answer 2

89 + 92 + 87 + x = 90(4)

Answer 3

im confused! which one works?

Answer 4

89+92+87+x=360
268+x=360
x=360-268
x=92

Answer 5

gotcha! thankyou!