rfieldgrove7038 rfieldgrove7038

02-06-2018
Mathematics

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Paul has grades of 86 and 85 on his first two tests. what must he score on his third test in order to have an average of at least 90

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a3541649783 a3541649783

02-06-2018

you can think the third score is x
86+85+x=90*3
x=99

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cchikoo cchikoo

02-06-2018

3*90=270 ( multiply the number of tests which is 3, times 90 to get the total score)

86+85=171 (adding two test together)
270-171= 99

You will need at least 99 in your third test!

Hope this helps!

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