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1. pb is a line segment on a number line. it has endpoints at -2 and 12. what is the coordinate of its midpoint?
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2. the midpoint of cd is e(-1,0). one endpoint is c(5,2). what are the coordinates of the other endpoint?

Astudent draws two parabolas on graph paper. both parabolas cross the x-axis at (-4, 0) and (6,0). the y-intercept of thefirst parabola is (0, –12). the y-intercept of the second parabola is (0-24). what is the positive difference between the avalues for the two functions that describe the parabolas? write your answer as a decimal rounded to the nearest tenth.

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?

Sara made $253 for 11 hours of work. at the same rate how much would he make for 7 hours of work?