Answer:
y=30x-x²
y=200
200= 30x-x²
0= -x²+30x-200
x²-30x+200=0
(x-20)(x-10)=0
x-20=0 x-10=0
x=20 x=10
the values of x are 20 and 10
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Answer:
y=30x-x²
y=200
200= 30x-x²
0= -x²+30x-200
x²-30x+200=0
(x-20)(x-10)=0
x-20=0 x-10=0
x=20 x=10
the values of x are 20 and 10