Algebra I Semester I Review

Bob has $150 in his savings account and saves $40 per month. Which equation represents the amount Bob has in his account after x months? Identify the correct equation and description for Bob's savings

• y = 150x + 40, Bob's initial balance was $150 and his account increases by $150 each month.

• y = 40x + 150, Bob's initial balance was $150 and his account increases by $40 each month.

• y = 150x + 40, Bob's initial balance was $40 and his account increases by $150 each month.

• y = 40x + 150, Bob's initial balance was $40 and his account increases by $150 each month.

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 can not find an error

• Instead of adding 3k they should subtract 3k

5 + 2(n + 1) = 2n
Bill says the first step is to add and get
7(n + 1) = 2n

• Bill is correct

• Bill is wrong; he should have distributed the 2 first.

• Bill is wrong; he should have subtracted 5 from both sides first.

• Bill is wrong; he should have divided by 2 firat.

^{What is the x- intercept of the line?}

• (0,-2)

• (0,-1)

• (-1,0)

• (-2,0)

Which statement best describes the function f(x) = -2x + 1

• a line with positive slope that crosses the y-axis at a positive value

• a line with negative slope that crosses the y-axis at a positive value

• a quadratic function with a positive vertex

• a quadratic function that increases when x > 1

Add or Subtract to Simplify:
(5x + x² - 4) - (4x - x² + 6)

• 2x² + x + 2 

• x + 2

• 2x² + x - 10 

• x - 10 

Solve the equation: 
x + 7 = 12

• x = 5

• x = 19

• x = -5

• x = 84

Solve:  -3 ≤ 2x - 1 ≤ 5

• -1 ≤ x ≤ 3

• -1 < x < 3

• 1 < x < 3

• 1 ≤ x ≤ 3

Which equation matches the graph?

• y= 1x + 3

• y= 1x

• y= -1x + 3

• y= -1x

What type of slope does the graph have?

• Positive

• Negative

• Zero Slope

• Undefined