Heckman Solving review

Vocabulary

100

What is a letter that represents an unknown number? 

A variable 

200

What is a number whose value doesn't change? It's always the same number. 

A constant 

300

What sign makes something an equation? 

An equal sign

400

Does an algebraic expression have an equal sign? 

No. 

500

Finding a number that makes an equation true is called finding  _________________. Hint: Look at your pink solving notes. 

a solution

Evaluating

100

If x=2,

x + 30

32

200

If x=2,

30 - x -x 

26

300

If x=2,

30x 

60

400

If x=2 and y=5

30/x + y

20

500

If x=2, y=5

2y + 3x

16

Writing Expressions

100

Nine plus x 

9 + x 

200

The product of 9 and y 

9y 

300

the quotient of 10 and c 

10/c

400

The sum of a and b and 12

a + b + 12

500

forty-five less than c 

c-45

Writing Equations

100

The number of eggs in the refrigerator is 10.

Example: The number of carrots in the refrigerator is 14. c=14

e = 10 

200

The number of carrots in the refrigerator minus 5 is 10 

c -5 = 10 

300

A number divided by 7 is the same as 40 

n/7 = 40

400

Nine cupcakes cost $36. 

Hint: We're multiplying the cost of the cupcakes. 

9c = 36

500

Some donuts decreased by 5 is 13 donuts. 

d-5=13

Solutions

100

n + 7 = 32

Is n= 14 a solution? 

No. 

200

7n= 14

Is n= 7 a solution? 

No.

7(7) =49

300

13/n = 1

Is n=13 a solution? 

Yes.

400

2n + 5 = 15

Is n = 5 a solution? 

Yes 

500

2(n -6) = 10

Is n=11 a solution? 

Yes