Algebra Unit 2

x + y = 2 2y - x = 10

(-2,4)

x - 2y = 2 3x + y = 6

(2,0)

Determine which of the following is NOT an arithmetic sequence.

- 24, -12, -6, -3, ...

Determine which of the following is NOT an arithmetic sequence.

10, 20, 40, 80, ...

What is y + 4 = 2/3(x - 6) in Standard Form?

2x - 3y = 24

If d(x) = 3x + 5, what is the value of d(-1)?

A. 2 Steps: Replace x with -1 and solve the equation.

y + x = -2 y = -x - 2

Answered : no solution I think: infinite solutions

If m(x) = 5x + 7, what is the value of m(x - 3)?

B. 5x - 8 Steps: Replace x with x-3 and solve the equation.

Which of the following best describes the vertical line test?

B. If a vertical line can be drawn so that it intersects the graph more than once, then the graph is NOT a function.

What is the graph of 6x + 3y = -24 if the domain is all the real numbers?

C. Graph 5

y > 2x + 1 y < -x + 1 What statement best describes the graph of the given system?

C. The solution contains the entire first quadrant. Incorrect

Consider the graph of 3x - y ≥ 1 and decide if the statement is true, or false. The boundary line has a negative slope.

False

Consider the graph of 3x - y ≥ 1 and decide if the statement is true, or false. The boundary line is dashed.

False

y > 2x + 1 y < -x + 1 Which point is in the solution set to the given system?

Selected Answer: B. (-1, 5) Incorrect

Consider the graph of 3x - y ≥ 1 and decide if the statement is true, or false. The point (0, 0) is NOT in the solution.

True

Consider the graph of 3x - y ≥ 1 and decide if the statement is true, or false. The point (1, 2) is in the solution.

True

2y -4x = 2 y = -3x + 6

exactly one solution

x = -3 y = 2x + 1

exactly one solution

y = 2x + 1 y = 2x - 4

no solution

What is the equation in Point-Slope Form of a line that passes through (-2, 5) with slope 3?

y + 5 = 3(x - 2) Incorrect

Which pair of lines IS perpendicular?

y - 12 = 4(x + 3)y - 12 =-1/4(x+3)

What is the equation in slope-intercept form of the line perpendicular to y = 2x - 4 that passes through the point (-2, 6)?

y = -1 2 x - 5 Incorrect

What is y + 7 = -2(x + 3) in Slope-Intercept Form?

y = -2x - 13

What is the equation in Slope-Intercept Form of a line that passes through (1, 2) and (-1, -2)?

y = 2x

What is the equation in slope-intercept form of the line parallel to y = 2x - 4 that passes through the point (-3, 4)?

y = 2x + 10

What is the equation in Slope-Intercept Form of a line that passes through (1, 5) with slope 2?

y = 2x + 3

What is the solution set for |r + 5| < 9?

{ r | -14 < r < 4}

What is the solution set for |a - 4| = 3?

{1, 7}