The value of y is 9 to make the equation true.
Answer:
$16.80
Step-by-step explanation:
30% of $24 is $7.20 so you need to do 24-7.20 and you will end up with $16.80. Hope this helps!
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Below is the solution:
<span>30x+10x+5y+30y = 40x +35y
</span>which means your cost function is <span>C(x) = 40x+17640/x
</span><span>then taking the derivative
C'(x) = 40-17640x^-2
</span><span>set that equal to zero and solve
</span><span>x=21
</span><span>so 504 = 21y
</span><span>y =24</span>
The answer is the 3rd option
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