Math Practice Test Set 7 - My Career Tools

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1. If y varies inversely as x and y = 8 when x = 3, find the value of x when y = 12.

A.8

B.-8

C.2

D.-2

Question 1 of 10

2. Typically, air temperature decreases through the night between midnight and 6:00 am. This is an example of what type of association?

A.constant association

B.positive linear association

C.negative linear association

D.no association

Question 2 of 10

3. \(\frac{x^{2}y-x^{5}y^{7}+x^{8}y^{4}}{x^{2}y}\)

Simplify.

A.\(1 - x^{3}y^{6} + x^{6}y^{3}, x,y ≠ 0\)

B.\(x^{4}y^{2} - x^{7}y^{8} + x^{10}y^{5}, x,y ≠ 0\)

C.\(x^{6}y^{3} - x^{3}y^{6} - 1, x,y ≠ 0 \)

D.\(xy - x^{3}y^{6} + x^{6}y^{3}, x,y ≠ 0 \)

Question 3 of 10

4. Peter is dividing a regular deck of 52 cards in half and choosing a card at random. What is the probability of choosing a Jack, if he happens to divide the deck perfectly into black cards and red cards and then chooses from the red cards?

A.\(\frac{1}{13}\)

B.\(\frac{2}{13}\)

C.\(\frac{1}{2}\)

D.\(\frac{1}{4}\)

Question 4 of 10

Math-Evaluate expression

5. Simplify the given expression.

−12 + 6(−4)

A.-36

B.36

C.-24

D.24

Question 5 of 10

6. Evaluate a − (b − c) at a = −7.36, b = −17.6, and c = −19.07.

A.-8.83

B.-19.07

C.8.83

D.19.07

Question 6 of 10

Math-Solution of equations

7. Use the substitution method to solve each of the following systems.

x = −5 − 2y
−2x − 6y = 18

A.(3,-4)

B.(4,3)

C.\((\frac{3}{4})\)

D.(6,-8)

Question 7 of 10

8. Which of the points (2, −14), (−1, −6), (−8, 11), and (3, −13) is a solution of the equation y = −2x − 8?

A.(−1, −6)

B.(2, −14)

C.(−8, 11)

D.(3, −13)

Question 8 of 10

Math-Exponents

9. Simplify the given exponential expression.

\(4^{n} \cdot 4^{8n+3}\)

A.\(4^{9n+3} \)

B.\(-4^{9n+3} \)

C.\(4^{9n-3} \)

D.\(-4^{9n-3} \)

Question 9 of 10

Math-Word problems

10. Two less than nine times an unknown number is 7. Find the unknown number.

A.1

B.0

C.-1

D.2

Question 10 of 10