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3 years ago

I need help fast plzz

Mathematics

1 answer:

svetlana [45]3 years ago

3 0

Ah hah ! This is exactly what I was telling you about in the other answer.

A pair of angles that are formed by 2 lines and DON't share a side are called
"vertical angles", and a pair of vertical angles are always equal.

In this problem, the two angles on the sides facing each other are vertical angles, and that tells you that they're equal.

So you can immediately write <u> 4y - 8 = 79 + y </u>,

and then you can easily solve that and find the value of 'y' .

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???????????????????????

drek231 [11]

Answer:

x ≅ 7

Step-by-step explanation:

cos(67°) = x/18

x = 18cos(67°) ≅ 7

7 0

2 years ago

Hey, I've been extremely confused with problems like :7x²-12x-4

bonufazy [111]

Factor by grouping.

(7x+2)(x-2) I think not sure

4 0

3 years ago

3. Use this graph to

Step2247 [10]

Answer:

def b

Step-by-step explanation:

6 0

3 years ago

On a Saturday, a library checked out 52 books. If 24 of the books were fiction, what is the ratio of non-fiction books to fictio

mariarad [96]

6:7
Steps:
52-24=28
24:28
24÷4 : 28÷4
6 : 7

8 0

3 years ago

The given line passes through the points and (-4, -3) and (4, 1).

Debora [2.8K]

Answer:

The equation of the line is y - 3 = -2(x + 4)

Step-by-step explanation:

* Lets explain how to solve the problem

- The slope of the line which passes through the points (x1 , y1) and

(x2 , y2) is $m=\frac{y_{2}-y_{1}}{x_{2}-x_{1}}$

- The product of the slopes of the perpendicular lines = -1

- That means if the slope of a line is m then the slope of the

perpendicular line to this line is -1/m

- The point-slope of the equation is $y - y_{1}=m(x - x_{1})$

* lets solve the problem

∵ A given line passes through points (-4 , -3) and (4 , 1)

∴ x1 = -4 , x2 = 4 and y1 = -3 , y2 = 1

∴ The slope of the line $m=\frac{1-(-3)}{4-(-4)}=\frac{1+3}{4+4}=\frac{4}{8}=\frac{1}{2}$

- The slope of the line perpendicular to this line is -1/m

∵ m = 1/2

∴ The slope of the perpendicular line is -2

- Lets find the equation of the line whose slope is -2 and passes

through point (-4 , 3)

∵ x1 = -4 , y1 = 3

∵ m = -2

∵ y - y1 = m(x - x1)

∴ y - 3 = -2(x - (-4))

∴ y - 3 = -2(x + 4)

* The equation of the line is y - 3 = -2(x + 4)

4 0

3 years ago