Question

Steve has these score on the exams for this semester: 89, 92, and 87. How much will have to make on the fourth exam to have a final average of an A (a 92% or better)?

Answer 1

solve for x
\[\frac{ 89+92+87+x }{ 400 } = .92\]

Answer 2

\[\frac{ 89+92+87+x }{ 4 }=92\]
is how most would set that up, i think

Answer 3

^_^

Answer 4

So its %100?

Answer 5

not quite..

first we need to isolate the 'x' term, so clear fractions would be the first step, so times both sides by the denomenator