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vfiekz [6]
3 years ago
15

which equation is the point-slope equation of the line that passes through the points (-2,-1) and (7,-4)?

Mathematics
1 answer:
zvonat [6]3 years ago
6 0

Answer:

B (for question 7)

Step-by-step explanation:

To find the slope, we use the equation m=\frac{y_{2} -y_{1} }{x_{2} -x_{1} }.

m = (-4+1)/(7+2) = -3/9 = -1/3

Since B is the only option that would give a slope of -1/3, B must be the answer.

(you can use this same method for question 8)

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What is y equal to when x= -2<br><br> Y=-x+4
Alex17521 [72]

Y= -2+4

If X equals -2, you want to plug -2 in for X.

I hope I helped!

:)

5 0
3 years ago
19. For the following exercises, use the descriptions of each pair of lines given below to find the slopes of Line 1 and Line 2.
worty [1.4K]

Answer:

The given lines are un-related.

Step-by-step explanation:

In the question, two lines are given as line 1 passes through (-8,-55) and (10,89). Whereas, line 2 passes through (9,-44) and (4,-14).

It is required to find the slope of given lines and figure out whether they are perpendicular, parallel or neither.

To solve this question, first find the slope of both lines. Check if their product is equal to -1, then they are perpendicular. If the slopes are equal the lines are parallel.

Step 1 of 2

Find the slope of first line.

$$\begin{aligned}&m_{1}=\frac{89-(-55)}{10-(-8)} \\&m_{1}=\frac{144}{18} \\&m_{1}=8\end{aligned}$$

Step 2 of 2

Find the slope of first line.

$$\begin{aligned}&m_{2}=\frac{-14-(-44)}{4-9} \\&m_{2}=\frac{30}{-5} \\&m_{2}=-6\end{aligned}$$

Since, both slopes are neither equal nor reciprocal of each other.

Therefore, the lines are un-related.

4 0
2 years ago
Number 4 please!!!!!
Kazeer [188]

Answer:9787987987987987899999999888888888888888888'

Step-by-step explanation:

that that that 14523095480239845023984203984230482309423094823029834

8 0
3 years ago
Simplify the following expression:
aliya0001 [1]

Answer:

-2x-8

Step-by-step explanation:

-1/3(6x+15)-3

-6/3x-15/3-3

-2x-5-3

-2x-8

7 0
3 years ago
Pricilla makes a profit of $24.50 on every scarf she sells the materials for each scarf cost
Lesechka [4]
32.89 should be the answer if I’m reading your question right
3 0
3 years ago
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