Question

Angela math test scores so far are as follows: 87, 96, 82, 77. What score must Angela make on the final test in order to have a test average of 88?

Answer 1

Let `x` be the score of the final test then

`(87+96+82+77+x)/5=88=>x=98`

Answer 2

I found `98`

Explanation:

Considering an average of `n` scores:

`(Sigma"scores")/n=(87+96+82+77+x)/5=88`
you get:
`342+x=5xx88`
`x=440-342=98`

Answer 3

Angela must score 98 in her final test.

Explanation:

Let `x` represent the score that Angela gets on her final test.

The average of all 5 of the tests can be found by computing,

`bar x=(87+96+82+77+x)/5=88`

from this we just use algebra and solve for `x`.

`(342+x)/5=88`
`x=(88xx5)-342`
`x=98`

Hope it helps :)