8th Grade Algebra I

Structure in Expressions

100

What is the formula for slope?

rise/run

OR

y2-y1/x2-x1

200

Find the slope between these two points: 

(2, 1), (4, 2)

slope: 1/2

300

Free 300 points!

Yay!!!

400

True or False: To graph the slope -2x, you must go down 2 and to the right 1.

True

500

Find the b from these two points:

(4, 3), (9, -2)

(Hint: the slope is -1.)

7

Polynomials & Rational Expressions

100

Determine whether it is a monomial, binomial, or trinomial:

8ab - 2c

binomial

200

Find the sum.

(3x² - 4) + (x² - 9)

4x² - 13

300

True or False: When subtracting polynomials, you have to find the additive inverse of a polynomial by writing the opposite of each term.

True

400

True or False: -2x times 4x² = -8x².

If false, state the correct answer.

False; -8x³.

500

Simplify the expression.

b(b² - 12b + 1)

b³ - 12b² + b

Creating Equations

100

A mathematical statement that contains two expressions and an equal sign is an _________.

equation

200

Write an equation that represents the sentence:

Six times a number z minus fifteen equals forty-five.

6z - 15 = 45

300

Translate the sentence into an inequality.

Five times a number minus one is greater than or equal to negative eleven.

5x - 1 ≥ -11

400

True or False: When graphing an inequality that has the symbol < and >, the circle will be closed.

False

500

Solve the inequality:

1/2a < 20

a < 40

Equations & Inequalities

100

What are the two ways to solve a system of equations?

Elimination and Substitution

200

Use substitution to solve the system of equations.

4x + 2y = -8

y = -2x - 4

-8 = -8 (identity)

How To:

4x + 2(-2x - 4) = -8

4x -4x - 8 = -8

-8 = -8

300

What can you do to eliminate the following set of systems of equations?

3x + 4y = 30

5x + 6y = 8

You can multiply the first set by -5x and you can multiply the second set by -3x. That is because there's no common multiple.

400

A family and consumer sciences class is making pillows and blankets to donate to a local shelter. The class has 40 yards of fabric to use. Pillows require 1.25 yards of fabric and take 1 hour to make. Blankets use 4 yards of fabric and take 2.5 hours to make. The class has 28 hours of class time left for the semester. Create a systems of equations.

1.25p + 4b ≤ 40

p + 2.5b ≤ 28

500

A set of two or more inequalities with the same variables is a _______ ___ ________________.

system of inequalities

+ More

100

1 + 1 = ?

2

200

What is PEMDAS?

P - parentheses

E - exponents

M - multiplication

D - division

A - addition

S - subtraction

300

b² * b² = ?

b⁴

400

State the formula for standard form.

Ax + By = C

500

Free 500 points!

+500

Yay!!!