Maximize Q=xy^2, where x and y are positive numbers, such that x + y^2=10

1 answer:

8 0

X+y^2=10
minus x from both sides
y^2=10-x
sub (10-x) for y^2 in other equation
Q=x(10-x)
Q=10x-x^2
now find the maximum value
take the derititive
dQ/dx=10-2x
it is zero at x=5
below that, it is positive
after 5, it is negative
max at x=5

solve for y
y^2=10-x
y^2=10-5
y^2=5
sqrt both sides
y=√5

x=5
y=√5
the max value is 25

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An angle measures 30° more than the measure of its supplementary angle. What is the measure of each angle?

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<h3>The coordinates of the bigger figure:</h3>

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