So first, we multiply out the brackets.
-15x - 18 + 2 = 17 + 16x -1
Then, bring all the terms onto one side so you can solve.
-15x-18+2-17-16x+1=0
Then, we simplify this.
-31x-32=0
Then, isolate x
-31x=32
x=32/-31 or -1.03 (nearest hundredth )
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Thus Lisa spent 135 $ .
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V of a cone= 1/2

V=1/2*pi*r^2*h = .5*pi*(9)*(10) = 141.4m^3
which problems? i can teach you how to do them if you want me too.