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jarptica [38.1K]
2 years ago
10

7x^2+16-8

Mathematics
2 answers:
I am Lyosha [343]2 years ago
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]2 years 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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timama [110]

Answer:

choice 1

Step-by-step explanation:

angle 1 = angle 7 (exterior alternate angle)

angle 3=angle 5 (interior alternate angle)

3 0
2 years ago
The rate at which a plant grows is constant. At the 3rd week it is 12 inches tall and at the 5th week it is 20 inches tall. If t
Likurg_2 [28]
It would be (12,20) or (20,12) I don't know which one
5 0
3 years ago
How do you solve this?
masha68 [24]
Here's what i found online:

<span>a/3+4=6

We simplify the equation to the form, which is simple to understand
<span>a/3+4=6

Simplifying:
<span> + 0.333333333333a+4=6

We move all terms containing a to the left and all other terms to the right.
<span> + 0.333333333333a=+6-4

We simplify left and right side of the equation.
<span> + 0.333333333333a=+2

We divide both sides of the equation by 0.333333333333 to get a.
<span>a=6

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4 0
3 years ago
3- An archaeologist descends 18 feet into a canyon, then climbs up 14 feet. 1 point
Lady_Fox [76]
4 feet.

Because 18-14 is 4
8 0
3 years ago
Please help me with 3.2 ​
Lady_Fox [76]

The measure of the angle ∠PQR is 90 degrees

<h3>How to prove that ∠PQR is 90 degrees?</h3>

The equation of the line PQ is given as:

3x - y - 2 = 0

The coordinates of the QR are given as:

(0, -2) and (6, -4)

Make y the subject in 3x - y - 2 = 0

y = 3x - 2

The slope of the above line is

m1 = 3

Next, we calculate the slope (m2) of points Q and R.

So, we have:

m2 = (y2- y1)/(x2 - x1)

This gives

m2 = (-4 + 2)/(6 - 0)

Evaluate

m2 = -1/3

The slopes of perpendicular lines are opposite reciprocals.

m1 = 3 and m2 = -1/3 are opposite reciprocals.

This means the lines PQ and QR are perpendicular lines.

The angle at the point of perpendicularity is 90 degrees

Hence, the measure of the angle ∠PQR is 90 degrees

Read more about linear equations at:

brainly.com/question/15602982

#SPJ1

4 0
2 years ago
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