Linear Equations and Inequalities
Which property justifies Bob solution of 5x-4=46 to 5x=50 to x=10?
A. Step 1: Addition property of =; Step 2: Multiplication property of =.
B. Step 1: Subtraction property of =; Step 2: Division property of =.
C. Step 1: Addition property of =; Step 2: Division property of =.
C. Step 1: Addition property of =; Step 2: Division property of =.
Which of the following is always true about the graph of a horizontal line?
A. The graph will have a positive y-intercept.
B. The graph will have a negative y-intercept.
C. The slope of the graph will be undefined.
D. The slope of the graph will be zero.
C. The slope of the graph will be undefined.
What will a scatter plot look like with both positive and linear association?
A. Scramble everywhere
B. Straight, going up, and closer together.
C. Going down and closer together.
D. Going up and scramble everywhere.
B. Straight, going up, and closer together.
Solve 3x + 3y= 21 with -3x + 2y=19: Show work!
(-1,8)
Which of the following is equivalent to 0.36 repeating?
A. 10/30
B. 4/11
C. 9/25
D. 12/3
B. 4/11
Henry gets to the last line of his work and is left with "3=3".
A. The solution is 3.
B. There is only one solution.
C. There is no solution.
D. There are infinite solutions
D. There are infinite solutions.
Find the slope of the line that contains (6,-2) and (-3,1).
R=-1
Which is true statement about two numerical sets of data that have negative association?
A. As one variable increases, the other variable does not change.
B. As one variable increases, the other variable increases.
C. As one variable decreases, the other variable decreases.
D. As one variable increases, the other variable decreases.
C. As one variable decreases, the other variable decreases.
Which of the following is y= -1/2 + 6 and y= x +3 for?
A. (6,-3)
B. (-5,-4)
C. (2,5)
D. (5,2)
C. (2,5)
Express 0.45 as a fraction in simplest form.
9/20
Which of the following equations would have no solutions?
A. 10c + 3 = 3 + 10c
B. -8 +16e = 16e - 8
C. 4(2e - 3) = 8e - 12
D. 3(-2c + 4) = -6c - 12
D. 3(-2c + 4) = -6c -12
Which of the following equations has a positive slope and a negative y-intercept?
A. y=3.5x
B. y=1/4x + 7
C. y=7.5x - 2
D. y=-5x - 8
D. y=-5x - 8
Which variables would the scatter plot at the right be most likely to represent where a bunch scatter plots are everywhere.
A. The number of siblings a person has and the person's GPA.
B. The number of guests at a hotel and the total water consumption.
C. The total number of miles driven and the total gallons of gas used.
D. The number of people at a concert and the total concession sales.
A. The number of siblings a person has and the person's GPA.
Which is a reasonable first step in -3x + 4y=14 and x + 2y =-12?
A. Multiply the 2nd equation by -3
B. Multiply the 2nd equation by 2
C. Multiply the 2nd equation by -2
D. Any of the above
A. Multiply the 2nd equation by -3
Evaluate 2√36 +12
24
Solve for the indicated variable for R=v/1 for V.
RI=V
Which of the following represents a non-linear equations?
A. y=3/x
B. y=-3x
C. y=1/3x + 3
D. y=3x + 3
A. y=3/x
What type of association would you expect to see between the amount of fog in the sky and the distance that a pilot can see?
A. Positive association
B. Negative association
C. No association
D. There is not enough information to tell.
B. Negative association
What kind of line in y= 2x + 2 and y= 2x - 2 is like?
Parallel
Solve x for x2 = 121
x=11
Which is the correct first step to solve 15-2.5n=40?
A. Add 2.5 to both sides.
B. Divide -2.5 from both sides.
C. Add 15 to both sides.
D. Subtract 15 from both sides.
C. Add 15 to both sides.
Which equation of the line that passes through (4,3) and (6,2)?
A. y=0.5x - 1
B. y= -0.5x +5
C. y= -0.5x + 1
D. y= x - 1
B. y= -0.5x +5
Predict what year the town would have 1,213 homes in y=84x + 625 and solve it.
x=7
Carla has 25 nickels and dimes for a total of $2.00. Which system of equations represents this situation?
A. n + d =25
5n + 10d =2.00
B. n + d =25
0.05n + 0.10d =2.00
C. n + d =2.00
0.05n + 0.10d =25
D. n - d =25
0.05n - 0.10d =2.00
B. n + d =25
0.05n + 0.10d =2.00
Estimate √24 to the nearest tenth
(5.4)