At a price of $0.50, how many more or fewer cups of lemonade do caroline and emily sell when the temperature is 60 60 degrees than when the temperature is 80 degrees?

In triangle abc, the length of side ab is 12 cm, the length of side bc is 5 cm, and the length of side ca is 9 cm. find the measure of angle a using the law of cosines.

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ah=4 and hc=1, find bh.

What is the solution to the equation below? 3/x-2+6=square root x-2 +8