May someone please help me with this :)

If square root x = -7, then x= -49 true or false

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.

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.