Simplify. (-6x^2 + 2y - 1) + (2x^2-5y + 3) a) -4x^2 + 3y -2 b) -4x^2 - 3y - 2 c) -4x^2 + 3y +2 d) -4x^2 -3y +2

Construct the graph that models the given situation

The maximum distance (in nautical miles) that a radio transmitter signal can be sent is represented by the expression 1.23h√, where h is the height (in feet) above the transmitter. estimate the maximum distance x (in nautical miles) between the plane that is receiving the signal and the transmitter. round your answer to the nearest tenth.

Two trains leave a station on different tracks. the tracks make an angle of 130°, with the station as a vertex. the first train travels 100 km and makes its first stop at point a, while the second train travels 200 km and makes it first stop at point b. how far apart are the trains when both are at their first stop? round the answer to the nearest integer. a) 65 km b) 139 km c) 224 km d) 275 km