Simplify sin (7x)−sin(3x)cos(7x)−cos(3x) to an expression involving a single trigonometric function.

2x + 1 < 5 solve the following inequality. then place the correct number in the box provided.

When the solutions to each of the two equations below are graphed in the xy-coordinate plane, the graphs of the solutions intersect at two places. write the y-cordninates of the points of intersection in the boxes below in order from smallest to largest. y=2x y=x^2-3

Acomputer store buys a computer system at a cost of $370.80. the selling price was first at $ 618, but then the store advertised a 20 % markdown on the system. answer parts a and b. a. find the current sale price.