Unit 5 Review

 $5.7\ +\left(-5.7\right)$  is equal to zero.

• True

• False

 $\left(-5.8\right)\ +\left(-13.2\right)$  is positive.

• True

• False

 $-3.7\ -\left(-\frac{16}{4}\right)$  is positive.

• True

• False

 $\frac{7}{2}\ +\left(-3.5\right)\$  is negative

• True

• False

 $85\ -\left(-120\right)$  is negative.

• True

• False

A helicopter is flying at 150 feet above sea level. Directly below the helicopter, a butterfly is flying 15 feet above sea level. Directly below the helicopter and the butterfly is a frog, sitting on the bottom of the pond 8 feet below sea level. Select all the true statements.

• The difference in height between the butterfly and the helicopter is -135 feet.

• The difference in height between the butterfly and the helicopter is 135 feet.

• The distance between the heights of the butterfly and helicopter is -135 feet.

• The difference in height between the butterfly and the frog is -23 feet.

• The difference in height between the butterfly and the frog is 23 feet.

Let x =  $-\frac{11}{3}$  and y =  $-\frac{11}{6}$  .  Which expressions have a negative value?

•  $x+y$  

•  $x-y$  

•  $xy$  

•  $\frac{x}{y}$  

 $-5\ \cdot\frac{3}{4}$  

•  $\frac{15}{4}$  

•  $-\frac{15}{4}$  

•  $-\frac{3}{20}$  

•  $\frac{3}{20}$  

 $\left(-5\right)\cdot\left(-\frac{3}{4}\right)$  

•  $-\frac{15}{4}$  

•  $\frac{3}{20}$  

•  $-\frac{3}{20}$  

•  $\frac{15}{4}$  

 $-\frac{24}{6}$  

•  $4$  

•  $-4$  

•  $\frac{1}{4}$  

•  $-\frac{1}{4}$