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salinasroel22
05.07.2019 •
Mathematics
You score 64/75 on your first test. after your second test, your teacher tells you your test average is 88%
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Ответ:
First you need to divide 64 by 75 and then multiply by 100 which is 85.3% which then you need to find the average of the 2 which will be (85.3+x)/2=88 where x= the value of the second test.
Then you will need to isolate the x with the following steps:
multiply each side by 2 making it 85.3+x=176Subtract 85.3 from each sidethis results in 90.7Ответ:
90.66%
Step-by-step explanation:
let x be the second test score,
0.5( 64/75 + x ) = 0.88
solve for x
x = 0.88 * 2 - 64/75 = 0.906666
which is equivalent to 90.6666... %
Ответ:
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