40 !

1. evaluate x + y when x = 83 and y = –24.

a. –107

b. –59

c. 59

d. 107

2. simplify.

4.1 + 5.6

a. 1.4

b. 1.5

c. 9.16

d. 9.7

3. simplify.

7.6 + (–2.3)

a. –9.9

b. –5.3

c. 5.3

d. 9.9

If, while training for a marathon, you ran 60 miles in 2/3 months, how many miles did you run each month? (assume you ran the same amount each month) write your answer as a whole number, proper fraction, or mixed number in simplest form. you ran __ miles each month.

*let m∠cob = 50°30’, m∠aob = 70° and m∠aoc = 20°30’. could point c be in the interior of ∠aob? why?

Atrain leaves little? rock, arkansas, and travels north at 90 kilometers per hour. another train leaves at the same time and travels south at 80 kilometers per hour. how long will it take before they are 680 kilometers? apart?