Keystone Review Algebra

The set of ordered pairs shown below is a relation that is a function of x.

{(-5, 1), (-4, 1), (-3, 1), (-2, 1)}

Which ordered pairs could be included in the set so that the relation remains a function of x?

• (-6, 1), (-5, -1)

• (-6, 1), (-1, -1)

• (-2, 2), (-1, 1)

• (-3, 0), (-1, 1)

(4x+1)(5x−2)

• 20x² + 3x − 2

• 20x² − 11x + 5

• 20x² − 18x + 2

• 20x² − 3x − 2

−2|−2r − 4| = -12

• {5,1}

• {-5,-1}

• {-5,1}

• No Solution

| x + 1 | ≥ 3

• No Solution

• All Real Numbers

• x ≤ -4  or  x ≥ 2

• -4 ≤ x ≤ 2

In simplest radical form,
2√50 is equivalent to

• 5√2

• 7√2

• 10√2

• 4√5

Write as an algebraic expression

the product of 5 and a number

In an experiment, a plant grows 0.05 centimeters per day.  The plant had a height of 2 centimeters when the experiment started.  Which equation describes the relationship between the number of days (d) the experiment lasts and the height (h), in centimeters, of the plant?

• h=0.05d+2

• h=0.05(2)+d

• h=2d+0.05

• h=2.05d

Juanita used the steps shown below to correctly solve an equation. A step is missing. Which shows the equation that is most likely a missing step and the property that justifies the step?

• -3c-6+4c=10c+9

  Associative property of addition

• -3c-6+4c=10c+9

  distributive property

• -3c+18+4c=10c+45

  distibutive property

• -3c+18+4c=10c+45

  associative property of addition

Christine sells a total of 50 tickets to a school play.  Student tickets sell for $1.50 each, and adult tickets sell for $4.00 each.  Christine made a total of $112.50 in ticket sales.  Christine writes a system of equations to represent this information.  Which statement best describes the solution to the system of equations. 

• Christine sells 35 student tickets and 15 adult tickets.  

• Christine would earn $200 by selling 50 adult tickets

• Christine sells a pair of tickets between $3 and $8

• Christine could not earn $112.50 by selling 50 student tickets.

What is the slope of the line through the points (1, 2) and (8, 6)?

• 7/4

• 4/7

• 5/6

• 6/5