Jim bought 7 books. Some books cost $10 each and some cost $20 each. In all, he spent $210. Which system of linear equations represents the given situation?

• A. x + 7y = 20 and x + 10y = 210

  Incorrect

• B. x + y = 7 and 20x – 10y = 210

  Incorrect

• C. x + y = 7 and 10x + 20y = 210

  Correct

• D. x + y = 7 and 10x + 20y = 30

  Incorrect

What are the possible values of x if the distance between the points (x, 8) and (–5, 3) is units?

• A. {–2, 9}

  Incorrect

• B. {9, 1}

  Incorrect

• C. {–9, –1}

  Correct

• D. {–8, –3}

  Incorrect

What is the slope of the line shown?

• A. –1

  Incorrect

• B. 1

  Correct

• C. 2

  Incorrect

• D. 3

  Incorrect

Which system of linear inequalities defines the shaded region?

• A.

  Incorrect

• B.

  Correct

• C.

  Incorrect

• D.

  Incorrect

Which of the following points lies on the graph of the function

y = 2(3)^x?

• A. (2, 0)

  Incorrect

• B. (1, 3)

  Incorrect

• C. (1, 4)

  Incorrect

• D. (0, 2)

  Correct

Which of the following graphs represents the parabola

y + 3 = 2x² + 4x +2?

• A.

  Incorrect

• B.

  Correct

• C.

  Incorrect

• D.

  Incorrect

What is the simplest form of the expression

?

(Disregard values which for which the original expression is undefined.)

• A.

  Incorrect

• B.

  Correct

• C.

  Incorrect

• D.

  Incorrect

What is the value of p in the equation

?

• A.

  Correct

• B.

  Incorrect

• C.

  Incorrect

• D.

  Incorrect

What is the complete factorization of the polynomial 64x³ – 121x?

• A. x(8x + 12)(8x – 10)

  Incorrect

• B. x(8x + 11)(8x – 11)

  Correct

• C. x(x + 11)(8x – 11)

  Incorrect

• D. x(8x + 11)(11x – 11)

  Incorrect

Which of the following statements is true about the given system of linear equations?

x – y = 2

–2x + 2y = –1

• A. The system has a unique solution.

  Incorrect

• B. The system has infinitely many solutions.

  Incorrect

• C. The system has no solution.

  Correct

• D. The system has two solutions.

  Incorrect

What is the equation of variation if y = 18 when x = 6, and y varies directly as x?

• A. y = 3x

  Correct

• B. x = 3y

  Incorrect

• C.

  Incorrect

• D.

  Incorrect

What are the solutions for the quadratic equation

2x² – 12x – 32 = 0?

• A. {2, 8}

  Incorrect

• B. {–2, –8}

  Incorrect

• C. {–2, 8}

  Correct

• D. {2, –8}

  Incorrect

What is the solution of the equation 8x – 7 = 33?

• A. 7

  Incorrect

• B. 5

  Correct

• C. 3

  Incorrect

• D. 1

  Incorrect

The perimeter of a rectangle is 32 units. Its width is 6 units. What is the area of the rectangle?

• A. 44 square units

  Incorrect

• B. 60 square units

  Correct

• C. 72 square units

  Incorrect

• D. 80 square units

  Incorrect

What is the value of y if

?

• A.

  Incorrect

• B.

  Correct

• C.

  Incorrect

• D.

  Incorrect

What is the equation of the line joining the points (1, 1) and (7, 2)?

• A.

  Correct

• B.

  Incorrect

• C.

  Incorrect

• D.

  Incorrect

The scatter plot shows the population of Central City during certain years.

Which best describes the correlation shown in the scatter plot?

• A. Positive correlation

  Correct

• B. Negative correlation

  Incorrect

• C. Cannot be determined

  Incorrect

• D. No correlation

  Incorrect

What is the interquartile range for the given set of temperatures?

• A. 7

  Incorrect

• B. 8

  Incorrect

• C. 9

  Correct

• D. 12

  Incorrect

The original price of a watch is $60. After the discount, the new price is $54. What is the price discount as a percent?

• A. 3%

  Incorrect

• B. 5%

  Incorrect

• C. 7%

  Incorrect

• D. 10%

  Correct

A number increased by 50 is equal to 199. What is the number?

• A. 149

  Correct

• B. 159

  Incorrect

• C. 249

  Incorrect

• D. 259

  Incorrect