PSSA 8th Grade Review #2

Which value of x makes the following equation true?

4(x - 1) + 52 = -4x

Lesson 2-5

• 5

• -6

• -5

• $-5\frac{5}{8}$

Simplify

 $9^7x\ \left(9^{12}\right)^{-4}$  
Lessons 1-3, 1-4, 1-5

•  $9^{55}$  

•  $\frac{1}{9^{55}}$  

•  $9^{41}$  

•  $\frac{1}{9^{41}}$  

The speed of light is 299,792.458 km/s.

Which of the following would be a reasonable estimate for the speed of light?  
Lesson 1-6

•  $3x10^5\ \frac{km}{s}$  

•  $3x10^{-5}\ \frac{km}{s}$  

•  $3x10^6\ \frac{km}{s}$  

•  $3x10^{-6}\ \frac{km}{s}$  

Which value for x makes the sentence true?

7x = 4x + 12

Lesson 2-5

• 1

• 15

• 9

• 4

Solve for x.
 $\frac{6}{7}x-\frac{3}{7}=\ 10$  
Lesson 2-2

•  $\frac{7}{5}$  

•  $\frac{67}{6}$  

•  $\frac{73}{6}$  

• 67

Which of the following best describes the solution to the equation below?

18x + 9 = 9x + 31

Lesson 2-5

• exactly one real solution, x = 22

• no real solutions

• exactly one real solution, $x=2\frac{4}{9}$

• infinite real solutions

Which of the following best describes the solution to the system of equations below?

8x + 8y = 5

8x + 8y = 14

Lesson 3-8

• The system of equations has exactly one solution where x = 0 and y = 5/8

• The system of equations has exactly one solution where x = 5 and y = 14

• The system of equations has infinitely many solutions.

• The system of equations has no solution.

Simplify
 $\left(5^2\right)^6\div5^8$  
Lessons 1-3 and 1-4

•  $5^{20}$  

•  $5^0$  

•  $5^4$  

• 5

Which of the following best describes the solution to the system of equations below?

4x + y = 9

3x - 2y = 15

Lesson 3-8

• x = -1, y = 13

• x = 6, y = -15

• x = 9, y = 6

• x = 3, y = -3

Which of the following best describes the solution to the equation below?

8x + 19 = -28 + 8x

Lesson 2-5

• infinite real solutions

• $exactly\ one\ real\ solution,\ x=-2\frac{1}{16}$

• no real solutions

• $exactly\ one\ real\ solution,\ x=-1\frac{3}{4}$