Computation w/ Signed Numbers Review

Which of the following is equivalent (equal) to

 $-7-8$  

•  $-7+8$  

•  $-7-\left(-8\right)$  

•  $7+8$  

•  $-7+\left(-8\right)$  

What value is NOT EQUAL to the other three?

• 
  

  $-\frac{4}{5}$
  

• $\frac{-4}{-5}$

• $-0.8$

• $\frac{4}{-5}$

Find the difference

 $1\frac{1}{2\ }-4\frac{3}{4\ }$  

The sum of two integers is -15. One of the integers is +8. What is the other integer?

• 
  

  $23$
  

• $7$

• $-7$

• $-23$

Solve

 $\frac{\frac{-2}{5}}{\frac{7}{8}}$  

•  $-\frac{16}{35}$  

•  $\frac{16}{35}$  

•  $-\frac{14}{40}$  

•  $\frac{14}{40}$  

A submarine at 1,450 meters below sea level descends an additional 900 meters. What integer represents the submarine's new position with respect to sea level.

Evaluate

 $\frac{xy}{z}$  
if  $x=-7,\ y=8,$ and  $z=-2$  

• -28

• 28

• 1/2

• -1/2

Two numbers have a product of 24 and a sum of -10. What are the two numbers?

• 6 and 4

• -8 and -3

• -6 and -4

• 8 and 3

Solve the following expression:
 $\left(-3\right)^{2\ }\cdot\left(-5\right)$  

Write the expression illustrated by the vertical number line

• $-3+6$

• $-3+3$

• $-3-6$

• $-3-3$