# Exam Review

## Take a look at these videos and examples:

Simplifying Expressions:

https://youtu.be/KL5mZ1gArQE

Solving Equations:

https://youtu.be/oIxxqztQz3Y

Solving equations with fractions:

https://youtu.be/vk4CP10bys0

2 other suggestions for solving equations with fractions:

1) Turn all fractions into decimals and solve like you would with integers.

Subtract .25 from both sides of the equation

.3333x + .25 = .75

- .25 = -.25

.333x = .50

Divide both sides by .333 so x = =1.5

2) Multiply the equation by a number that will get rid of all of the denominators.

Writing the equation of a line given 2 points:

https://youtu.be/4il4haYASys

(3, 4) and (6, 10)

1) Find the slope (m). Change in the Ys over Change in the Xs

2) Pick one of the two points. It does not matter which one. I will chose (3, 4) because I like smaller numbers J

3) You now have a Y and an X and an M so you can substitute into the equation of a line y=mx+b

y = 4 x = 3 and m = 2

4= 2(3) +b

4 = 6 + b

-6 -6

-2 = b

So y=mx + b à y = 2x - 2

Finding the equation of a line given a point and a parallel line:

https://youtu.be/TrONIeOpJHg

Finding the equation of a line given a point and a perpendicular line:

https://youtu.be/QCWVlSr0khQ