What is the expression 13b−13 factored?

If c(x) = 4x – 2 and d(x) = x2 + 5x, what is (cxd)(x)

Ineeeeed this is due tomorrow and i dont know the answer can you find all the exponents

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.