1. evaluate 7m+2n-8p over n for m = –4, n = 2, and p = 1.5.
2. a mountain climber ascends a mountain to its peak. the peak is 14,090 ft above sea level. the climber then descends 490 ft to meet a fellow climber. find the climber’s elevation above sea level after meeting the other climber.
3. evaluate x(–y + z) for x = 3, y = 3, and z = 1.
4. simplify the expression. 1.4 – 5.5 – 1.73 + 1.8 – 1.09