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7 answers
A field goal kicker has made 28 out of 40 attempted field goals so far this season. His field goal average is 0.7. How many consecutive field goals must he make to increase his average to 0.8? The answer wasn t 32 or 4.
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Anonymous
1.00 - 0.8 = 0.20 Then 0.20 x 100 = 20
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Anonymous
(28+x)/(40+x) = 0.8 solve for x 28+x = 0.8(40+x) 28+x = 32 +0.8x 0.2x =4 x=20 20 consecutive field goals
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Anonymous
(28+y)/(40+y)=.8 28+y=.8(40+y) 28+y=32+.8y .2y=4 y=20 48/60
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Anonymous
He'd need to make 20 consecutive field goals. (28 + 20) / (40 + 20) = 48/60 = 4/5 = 0.8.
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Anonymous
(28+x)/(40+x) = 0.8 28+x = 32+0.8x 0.2x = 4 x = 20 [check 48/60 = 0.8] ✓ Answer 20
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Anonymous
(28+x)/(40+x) = 0.8 28+x = .8(40+x) 28+x = 32 +.8x .2x = 4 x = 4/.2 = 20 48/60 = .8 check
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Anonymous
20
