Math Review

Easy Math

100

What does sum and difference mean? (Make sure you say which is which.

Sum- to add

Difference- to subtract

200

35+76 (you can't use a calculator)

111

300

226-130 (you can't use a calculator) 

96

400

14 x 15 (no calculator) 

210

500

1080/3 (you can't use a calculator) 

1080

Linear Equations

100

What is a linear equation?

An an equation that has a constant rate of change. (Adds or subtracts by the same amount)

200

What is the ROC in this equation:

y=35+26x

26

300

Mrs. Price is buying pizza and a 2 liter for a party. The 2 liter cost $5 and each pizza will cost $10. Write an equation to show how much money she will spend in total. 

y=5+10x

400

The function f(x)=20x+120 represents the cost of a cell phone plan, plus the cost per cell phone. How much would you pay if you bought 3 cell phones? 

$180

500

The function f(x)=14x+5 represents the rate in which a flower grows, including the original height. How many weeks has it been growing if it is now 47 inches tall? 

3 weeks.

Exponential Equations

100

What are key two key words you should look for to know that a situation will represent an exponential equation?

halfing, doubling, tripling

200

What is the starting amount in the following equation?

y=13(3)^x

13

300

Mrs. Price is buying pizza for a party. The first pizza will cost $3 and each pizza will double after that. Write an equation to show how much money she will spend in total.

y=3(2)^x

400

The function f(x)=120(3)^x represents the cost of a cell phone plan, plus the cost per cell phone. How much would you pay if you bought 3 cell phones?

$3240

500

The function f(x)=5(2)^x represents the rate in which a flower grows, including the original height. How many weeks has it been growing if it is now 40 inches tall?

3 weeks

Solving Equations

100

Where can you go to solve equations? 

Desmos

200

Solve the equation

2x+13 = 3x

x=13

300

Solve the equation: 

2x + 3 = 7

x=0

400

Solve the equation:

6x²+3=4

x=-0.408 x=0.408

500

How many solutions will the equation 12x²+13=12

2

Systems of Equations

100

How many equations are in as system of equations?

2 or more

200

A solution to a set of equations makes ____________  ___________  __________.

both equations true.

300

A solution to a GRAPH of a system of equations is where the _____________ ______________

lines touch (intersect, cross, meet)

400

What is the solution to the following system of equations?

{12x-4y=6}

{30-2x=2y}

(4.125,10.875)

500

Is the ordered pair (3,4) a solution to the following system of equations?

{3x+3y=21}

{2x-y=2}

Show your work

Yes

3(3) + 3(4)=21                                       2(3)-4=2

9+12=21                                                  6-4=2

21 = 21                                                      2=2