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sdas [7]
2 years ago
14

What is the equation of a line, in point-slope form, that passes through (-4, -1) and has a slope of (5, 7)

Mathematics
2 answers:
bearhunter [10]2 years ago
8 0

It is y+1=0.9(x+4) because the formula is y - y1=m(x + x1) you only need one point and the slope. If you have two points, you need to find the slope by using the slope formula slope=y2-y1/x2-x1. Filling it in it would look like slope=7-(-1)/5-(-4). The double negatives cancel each other out and it turns to addition signs leaving us with slope=7+1/5+4 so the slope is 8/9 or 0.9. Now you can fill out the point-slope formula y+1=0.9(x+4)

skad [1K]2 years ago
8 0

The point-slope equation of a line:

y - y1 = m(x - x1)

where (x1, y1) is a point on the line, and m is the slope.

slope = m = (y2 - y1)/(x2 - x1) = (-1 - 7)/(-4 - 5) = -8/-9 = 8/9

You can use either point as (x1, y1). I will use point (5, 7).

y - 7 = (8/9)(x - 5)

You might be interested in
A store is having a sale on jelly beans and trail mix. For 8 pounds of jelly beans and 3 pounds of trail mix, the total is $18.
topjm [15]

Answer: each pound of jelly beans costs 1.5 dollars, or $1.50, and each pound of trail mix costs 2 dollars, or $2

Step-by-step explanation:

j = jellybeans

t = trail mix

2j + 5t = 13

8j + 3t = 18

To solve this, we want to isolate a variable, and solve for the other. Let's do that with each equation.

2j + 5t = 13

2j = 13 - 5t

j = (13 - 5t) / 2

8j + 3t = 18

8j = 18 - 3t

j = (18 - 3t) / 8

Now that we have isolated the variable j in each equation, we can set the two right-sides equal to each other, and solve for t.

(13 - 5t) / 2 = (18 - 3t) / 8

By multiplying both sides by 8, this becomes simpler to look at.

8 * (13 - 5t) / 2 = 18 - 3t

4 * (13 - 5t) = 18 - 3t

4 * 13 - 4 * 5t = 18 - 3t

52 - 20t = 18 - 3t

52 = 18 + 17t

34 = 17t

34 / 17 = t

t = 2

Now that we have solved for t, we can trivially plug it into one of the other equations to solve for j. Let's choose the first equation, as it doesn't matter which we choose.

t = 2

2j + 5t = 13

2j + 5 * 2 = 13

2j + 10 = 13

2j = 13 - 10

2j = 3

j = 1.5

So, each pound of jelly beans costs 1.5 dollars, or $1.50, and each pound of trail mix costs 2 dollars, or $2.

6 0
2 years ago
A. y=82x + 998<br> b. y=247.7x - 335<br> c. y=743x - 1647<br> d. y=998x + 82
MrMuchimi
A is the answer for the question
3 0
3 years ago
Read 2 more answers
-x+8x solve simplify the expression by combining like terms
Aleks [24]

the answer is 7x, becuase -1 + 8 is 7


3 0
3 years ago
Somebody help me pleaseeeeeeeeee
Fudgin [204]

Answer:

Write the inequality: 2.90h + 4.75

Solve the inequality: 2.90h + 4.75 = 39.55

Step-by-step explanation:

I’m not really sure if its correct I got it off somebody else’s brainly account

I’m actually currently doing the test right now and ive been using you’re page for the answers, thanks you’re account was a big help .

6 0
3 years ago
SOMEONE HELP ME PLSS!! IT DUE TODAY!!
aniked [119]

I think its D I hope you do good on your test! Good luck!

6 0
2 years ago
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