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EastWind [94]
3 years ago
7

Angela’s average for six math tests is 87. on her first four tests she had scores of 93, 87, 82, and 86. on her last tests she s

cored 4 points lower than she did on her fifth test what scores did Angela receive on her firth and sixth tests?
Mathematics
1 answer:
Annette [7]3 years ago
7 0

Answer:

the scores on her last test is x (x > 0)

because on her last tests she scored 4 points lower than she did on her fifth test

=> the scores in the 5th test is x + 4

because Angela’s average for six math tests is 87, we have:

\frac{93 + 87 + 82 + 86 + x + x + 4}{6} = 87 \\  \\  <  =  >  \frac{352 + 2x}{6}   = 87 \\  \\  <  =  > 352 + 2x = 522 \\  \\  <  =  > 2x = 170 \\  \\  <  =  > x = 85

=> on her last test, she had 85

=> on her 5th test, she had 85 + 4 = 89

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