Solve, using the substitution method. j + k = 3 j – k = 7

the solution is (8, 1).

the solution is (5, –2).

there is no solution.

there are an infinite number of solutions.

Sarah took the advertising department from her company on a round trip to meet with a potential client. including sarah a total of 11 people took the trip. she was able to purchase coach tickets for $280 and first class tickets for $1280. she used her total budget for airfare for the trip, which was $6080. how many first class tickets did she buy? how many coach tickets did she buy?

Erin bought christmas cards for $2 each to send to her family and friends. which variable is the dependent variable?

Due to a packaging error, 4 cans labeled diet soda were accidentally filled with regular soda and placed in a 12 pack carton of diet soda. two cans were randomly selected from this 12 pack. what is the probability that both cans were regular soda?