Expressions and Equations Review

What is the equation of this line?

• y= 3x+1

• y= -x+3

• y= 1/3x-1

• y= -1/3x+1

What appears to be the solution to the system of equations shown in the graph below?

• (-4,-2)

• (-1,6)

• (-2,-6)

• (4,8)

Which equation is equivalent to 
12(4x-5)=18?

• 4x-5=6

• 4x-5=30

• 48x+60=18

• 48x-60=18

Solve

• 125

• 5

• 1/5

• 625

If the mean of the numbers 4, 8, x, and 12 is 9, what is the value of x?

• 12

• 10

• 11

• 13

What is the value of y in the following system of equations:
y=2x
y=4x-8

• 0

• 4

• 8

• 10

What is the solution of the following system?  (The intersection)

• (-0.5,8.5)

• (-0.5,0.5)

• (0,4)

• (2,-14)

The equation y=50x+30 represents the amount of money, y, in Amy’s savings account over time, x. The equation y=30x+50 represents the amount in Sally’s savings account. How does the graph of Sally’s account differ from the graph of Amy’s account?

• The graph representing Sally’s account starts lower on the y-axis.

• The graph representing Sally’s account starts closer to the origin.

• The graph representing Sally’s account is steeper.

• The graph representing Sally’s account is flatter.

The points (–3, –5), (0, 4), and (3, 13) lie on the same line. Which equation describes the function for that line?

• y=2x+1

• y = 3x + 4

• y = x + 4

• y = x + –2

Evaluate:
3⁴ x 3^-2

• 1/3

• 3

• 9

• 1/9