Answer:
![m=\frac{y-b}{x}](https://tex.z-dn.net/?f=m%3D%5Cfrac%7By-b%7D%7Bx%7D)
Step-by-step explanation:
So we have the equation:
![y=mx+b](https://tex.z-dn.net/?f=y%3Dmx%2Bb)
And we want to write it in terms of m.
So, let's subtract b from both sides:
![y-b=mx](https://tex.z-dn.net/?f=y-b%3Dmx)
Now, let's divide both sides by x:
![m=\frac{y-b}{x}](https://tex.z-dn.net/?f=m%3D%5Cfrac%7By-b%7D%7Bx%7D)
And we're done!
-7-1/2-5 because to solve, you do y2-y1/x2-x1
So you get -6/-3, which equals 2
SLOPE IS 2
We conclude that the starting average grade is 79.17%
<h3>
How to write the equation and solve it?</h3>
There are 50 students, let's say that the grades are measured between 1% and 100%.
And the average grade of the 50 students is A.
We know that after it increased by 20%, the average of the grades is 95.
Then we just need to solve the percentage equation:
95 = A*(1 + 20%/100%) = A*(1.2)
95/1.2 = A = 79.17
We conclude that the starting average grade is 79.17%
If you want to learn more about percentages:
brainly.com/question/843074
#SPJ1
10(x−2)+15=8x+7
Simplify
10(x−2)+15=8x+7
(10)(x)+(10)(−2)+15=8x+7(Distribute)
10x+−20+15=8x+7
(10x)+(−20+15)=8x+7(Combine Like Terms)
10x+−5=8x+7
10x−5=8x+7
Subtract 8x from both sides.
10x−5−8x=8x+7−8x
2x−5=7
Add 5 to both sides.
2x−5+5=7+5
2x=12
Divide both sides by 2.
2x/2 = 12/2
x=6
Answer:
point slope form y+4 = -3(x+1)
slope intercept form y = -3x-7
Step-by-step explanation:
We have a point and a slope, we can use the point slope form for the equation
y-y1 = m(x-x1)
y--4 = -3 (x--1)
y+4 = -3(x+1)
We can also manipulate the equation into slope intercept form
Distribute
y+4 = -3x -3
Subtract 4 from each side
y+4-4 =-3x-3-4
y = -3x-7