Seven less than twice a number is 11. find the number

Landon wallin is an auto mechanic who wishes to start his own business. he will need $4400 to purchase tools and equipment. landon decides to finance the purchase with a 48-month fixed installment loan with an apr of 5.5%. a) determine landon's finance charge. b) determine landon's monthly payment.

The last time i bought this product , it cost $20.00 but it looks like it cost 29. 60 today? what is the increase

Precalculus question, image attached.