Which is not a solution to tho equation 4x-y=5

Which problem could be  solved  by evaluating the expression  7×(−3)7×-3?

Which situation can be modeled by the inequality 5 + 10w ≥ 45? a. you start with $5 and save $10 a week until you have at least $45. b.you start with 5 baseball cards and purchase 10 cards every week until you have at most 45 cards. c.you start with 5 water bottles and purchases cases of 10 water bottles each until you have a total of 45 water bottles. d.you spend $5 plus $10 per week until you have less than $45.

Plz : denver is about 5,200 feet above sea level. which number line best represents this integer?