Review (semester 1)

x² - 9

• (x + 3) (x - 3)
• (x - 3) (x - 3)
• (x + 3) (x - 6)
• Can't factor using Diff. of Squares

4a² - 25

• (2a + 5) (2a - 5)
• (2a - 5) (2a - 5)
• (x + 5) (x - 5)
• Can't factor using Diff. of Squares

q² - 121

• (q + 11) (q - 11)
• (q - 11) (q - 11)
• (q + 11) (q + 11)
• Can't factor using Diff. of Squares

Find the error in the problem below:

19 - 2k = 3k - 1

+3k +3k

19 + 1k = -1

-19 -19

k = -20

• They should have divided by 1 for the last step

• They should add 19 instead of subtracting 19

• I cannot find an error

• Instead of adding 3k they should subtract 3k

Does this system of equations have a solution? Explain your reasoning.

Katie buys a necklace for $14.50 plus a 6% tax. Sharon buys a

bracelet for $12 plus a 6% tax.

Enter the sum, in dollars, that Katie and Sharon paid, including tax.

What will the equation look like after you combine like terms?

• -5x + 5 = 35

• x + 5 = 35

• 5x + 5 = 35

• -x + 5 = 35

Which letter matches the coordinate (4, -6)?

• G
• Z
• K
• None of the above

_{What is the y-intercept of the line?}

• y = 1/2
• y = 1
• y = -1/2
• y = -1