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Lilit [14]
3 years ago
15

Find the value of a and b when x=12

Mathematics
2 answers:
BigorU [14]3 years ago
8 0

Step-by-step explanation:

a = \frac{ 5{x}^{2} }{2}  = 360 \\ b =  \frac{2 {x}^{2}( x - 5) }{10x}

a =

\frac{5( {12}^{2} )}{2}  = 360 = a \\  \frac{5(144)}{2}  = 360 = a \\  5(72) = 360 = a \\ a = 360

b =

b =  \frac{2 {x}^{2} (x - 5)}{10x}  \\ b =  \frac{x(x - 5)}{5 }  \\ b =  \frac{ {x}^{2}  - 5x}{5}  \\ b =  \frac{ {12}^{2} - 5(12) }{5}  \\ b =  \frac{144 - 60}{5}  \\ b =  \frac{84}{5}  \\ b = 16.8

garri49 [273]3 years ago
5 0
A= 360
B= 2(12)²(7)/120= 2016/120=16.8
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