nickespinosa11
06.11.2019 •
Mathematics
Solve the proportion
2/z-5=z/0.5zpower2+7
a.1/5
b.6
c.-7/5
d.-14/5
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Ответ:
cross multiply
z(z - 5) = 2(0.5z^2 + 7) =
z^2 - 5z = z^2 + 14 =
z^2 - z^2 - 5z = 14
-5z = 14
z = -14/5
Ответ:
$911.60
Step-by-step explanation: 860 time 6% is 911.60