write the expression in simplest form

The water has been on the stove y=9.5x+62.1 after how many minutes will the tempature be 138.1 f

Hey hotel charges guests $19.75 a day to rent five video games at this rate which expression can be used to determine the charge for renting nine video games for one day at this hotel? pls

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