Find "x" and "y" from the given figure​

Solve with work adding cheese to a mcdonalds quarter pounder increases the fat content from 21g to 30g. what is the percent of change ?

If t17 = 3 (t5) in an arithmetic progression, find t1 in terms of d.

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