Big Ideas 9.1 Algebra

It costs $45 for a membership to a store. The monthly fee is $15. Which equation represents this situation if y = total cost and x = months?

• y = 60x

• y = 45x + 15

• y = 45 - 15x

• y = 45 + 15x

The maximum size for a text message is 160 characters. Which equation represents this situation if y = characters remaining and x = characters used?

• y = 160 - x

• y = 160x

• y = 160 + x

• 160 + y = x

Find the area of the parallelogram.

• 9 sq. units

• 10 sq. units

• 12 sq. units

• 16 sq. units

The sum of a number x and 4 equals 12. Choose the Correct equation.

• x + 4 = 12

• 4x = 12

• 12 + 4 = x

• 12x = 4

FUNDRAISING Students and faculty raised $6042 for band uniforms. The faculty raised $1780. Write an equation you can use to fi nd the amount a raised by the students.

• 1780 - a = 6042

• 6042 / 1780 = a

• 6042 = 1780 + a

• 6042 - a = 1780

A ____________ of an equation is a value that makes the equation true.

• range

• variable

• dependent

• solution

n + 7 = 9 
n = ?

• 6

• 2

• 16

• 63

 k + 6 = 18 
k = ______

• 12

• 24

• 108

• 1

40 = 4y
y = ________

• 160

• 44

• 10

• 36

18 > 12 + x
What is a possible value for x

• 6

• 8

• 3

• 10