Tan^2x+2=2secx find all solutions on the interval [0, 2pi)

Part a : solve -vp + 40 < 65 for v part b : solve 7w - 3r = 15 for r show your work .

Can you me find the missing length. i attached an image.

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.