HELP! I need the work shown

Given m parallel to p. Find the value of x.

Which expression is equivalent to 8(k + m) − 15(2k + 5m)?

The swimming pool is open when the high temperature is higher than 20∘c. lainey tried to swim on monday and thursday (which was 3 days later). the pool was open on monday, but it was closed on thursday. the high temperature was 30∘c on monday, but decreased at a constant rate in the next 3 days. write an inequality to determine the rate of temperature decrease in degrees celsius per day, d, from monday to thursday.

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).