The difference in elevation of a helicopter and a submarine is 18 1/2 meters. The elevation of the submarine is −7 3/4 meters. Write and solve an equation to find the elevation h (in meters) of the helicopter.

3-12. write each answer with a reasonable number of figures. find the absolute uncertainty and percent relative uncertainty for each answer. (a) [12.41 (±0.09) + 4.16 (±0.01)] x 7.068 2 (±0.000 4) =? (b) [3.26 (±0.10) x 8.47 (±0.05)] - 0.18 (±0.06) =? (c) 6.843 (±0.008) x 104 + [2.09 (±0.04)- 1.63 (±0.01)] =?

When a rectangle is dilated, how do the perimeter and area of the rectangle change?

Which shows the graph of the solution set of 3y – 2x > –18?