He sum of negative eighteen and a number is eleven. what is the number? which equation could be used to solve the problem?

15. jiovanni is looking in to two different companies that offer study guides for math exams.test prep 101 charges a $5 flat fee and an additional $0.25 per problem.math charges a $2 flat fee and an additional $0.50 per problem.how many prablems would make the costs of the two companies be equal? varibles: equations/eniqualities{ {

The graph shows the first four ordered pairs formed by the corresponding terms of two patterns. which ordered pair would be the fifth point on this graph? a. 12,8 b. 12,4 c. 10,4 d. 4,12

Which ordered pair makes both inequalities true? y< 3x-1 and y> -x+4 4,0 1,2 0,4 2,1