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2 years ago

Which is the equation of a line with a slope of -- 2 that passes through the point (-2,0)?

Mathematics

1 answer:

Goshia [24]2 years ago

7 0

Answer:

Y=-2X-8

Step-by-step explanation:

m=-2 (X1,Y1)=(-2,0)

(Y-Y1)=M(X-X1)

(Y-(0))=-2(X-(-2))

Y=-2X-8

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xeze [42]

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= -4 * 8
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2 years ago

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2 years ago

Read 2 more answers

Which of the following are solutions?

zloy xaker [14]

This is a quadratic equation. There's a shortcut (two shortcuts really) called the Shakespeare Quadratic Formula (2b or -2b) applicable when the middle term is even:

$x^2 - 2bx + c \textrm{ has zeros } x= b\pm \sqrt{b^2-c}$

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OK, our problem is

$9x^2 - 6x -7 = 0$

$x = \frac 1 9 (3 \pm \sqrt{9-(9)(-7)}) = \frac 1 9(3 \pm \sqrt{72})= \frac 1 9(3 \pm 3 \sqrt{8}) = \frac 1 3(1 \pm \sqrt 8)$

Typically we'd write $\sqrt 8 = 2 \sqrt 2$ but the answers here don't so we won't either.

Answer: C and D

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2 years ago

An easy question all wrong or unhelpful or no-work answers will be reported.

miss Akunina [59]

Elimination:

7x - 3y = 20
5x + 3y = 16
(add)
12x = 36
÷ 12
x = 3

(5 × 3) + 3y = 16
15 + 3y = 16
- 15
3y = 1
÷ 3
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Substitution:

5x + 3y = 16
- 3y
5x = 16 - 3y
÷ 5
x = 3.2 - 0.6y

5(3.2 - 0.6y) + 3y = 16
16 - 3y + 3y = 16
16 = 16
- 16
6y = 0
÷ 6
y = 0

Sorry the substitution messed up for some reason, I'll fix it after I've answered the other question

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2 years ago

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Hatshy [7]

Answer:

d67d6d 34r2

Step-by-step explanation:

d53eududc6ttd5cf

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2 years ago