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cestrela7 [59]
3 years ago
15

Which quadratic equation has roots of 5 and 7

Mathematics
2 answers:
vaieri [72.5K]3 years ago
6 0
D
Is te right answer............
Ivenika [448]3 years ago
4 0

Answer:

D

Step-by-step explanation:

Given the root of a quadratic equation x = a then the factor is (x - a)

Here the roots are x = 5 and x = 7 , then the corresponding factors are

(x - 5) , (x - 7)

The equation is then the product of the factors, that is

y = (x - 5)(x - 7) ← expand using FOIL

   = x² - 7x - 5x + 35 ← collect like terms

y = x² - 12x + 35 → D

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Answer:

She paid 9% of sales tax

Step-by-step explanation:

The sale price of diamond = $375

Let x be percent of sales tax

So, amount of tax = x\% \times 375 = \frac{x}{100} \times 375 =3.75x

So, Amount including tax = 375+3.75x

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Hence She paid 9% of sales tax

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Step-by-step explanation:

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Answer:

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