2 years ago

If x = -3 is the only x-intercept of the graph of a quadratic equation, which statement best describes the discriminant of the

Mathematics

1 answer:

klasskru [66]2 years ago

5 0

Answer:

The discriminant is 0

Step-by-step explanation:

If b² - 4ac = 0 then the roots are real and equal

Since there is only one x- intercept then this condition applies

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A craftsman can sell 10 jewelry sets for $500 each. He knows

liraira [26]

Answer:15

Step-by-step explanation:

Given

Craftsman sell 10 Jewelry set for $500 each

For each additional set he will decrease the price by $ 25

Suppose he sells n set over 10 set

Earning $=\text{Price of each set}\times \text{no of set}$

Earning $=(500-25n)(10+n)$

$E=5000+500n-25n^2-250n$

differentiate to get the maximum value

$\frac{dE}{dn}=-50n+250$

Equate $\frac{dE}{dn}$ to get maximum value

$-50n+250=0$

$n=\frac{250}{50}$

$n=5$

Thus must sell 5 extra set to maximize its earnings.

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2 years ago

Convert 3,200,000 to a scientific notation.

tia_tia [17]

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3 years ago

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BabaBlast [244]

Answer:

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Step-by-step explanation:

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1 year ago

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Verdich [7]

Answer:

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Step-by-step explanation:

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MAVERICK [17]

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Step-by-step explanation:

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