A-b =5 Work out the value of 2(a-b)
Work out the value of 7a - 7b
Work out the value of b-a​

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15

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.

What else equals 42 and 30 for multiply