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1 year ago

7x^2+16-8

2 answers:

5 0

First step (7x2 - 16x) - 8 = 0
Second step Factoring 7x2-16x-8

The first term is, 7x2 its coefficient is 7 .
The middle term is, -16x its coefficient is -16 .
The last term, "the constant", is -8

Step-1 : Multiply the coefficient of the first term by the constant 7 • -8 = -56

Step-2 : Find two factors of -56 whose sum equals the coefficient of the middle term, which is -16 .
All of that said it’ll be 2.708
How I got 2.708 is x =(16+√480)/14=(8+2√ 30 )/7= 2.708
And 0.422 is x =(16-√480)/14=(8-2√ 30 )/7= -0.422

lyudmila [28]1 year ago

4 0

Answer: 0.45 and -2.74

Step-by-step explanation:

You're going to want to use the Quadratic Formula, so (-b±√(b^2-4ac))/2a.

When you plug in you should get -16 ± √16^2-4(7)(-8)/2(7)

-16± √(256+224) all divided by 2 x 7 or 14

(-16 ± 22.3607)/14

0.45 and -2.74 are your answers

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2 years ago

If f(x) = x/2 + 8, what is f(x) when x = 10? 4 9 13 36

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2 years ago

Round your answer to the nearest hundreth

Juliette [100K]

Answer:

201.06 sq. ft.

Step-by-step explanation:

Area of a circle is found by using the equation:

$A = \pi r^{2}$

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2 years ago

Naomi and Peter's teacher receives an order of 127 books.The books are delivered in 10 full cartons and a smaller package contai

soldier1979 [14.2K]

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2 years ago

Read 2 more answers

20 points!! I need help

zaharov [31]

Answer:

11.33 * 16.33 meters to the nearest hundredth.

Step-by-step explanation:

Let the width of the pool be x meters, then the length is x+5 meters.

The length of whole area = x + 5 + 2(3) = x + 11 meters and the width is

x + 2(3) = x + 6 meters.

So we have the equation (x + 6)(x + 11) = 387.

x^2 + 17x + 66 = 387

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x = [-17 +/- sqrt (17^2 - 4*1*-321)] / 2

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So the width is 11.3 m and the length is 16.33 meters.

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3 years ago