Ineed a asnswer asapfor #7-8, is the relation a function? 7) (4,2), (1,2), (0,1), (-2,2), (3,3)8) (6,5), (4,3), (6,4), (5, 8)

Serena is making an experiment. for that, she needs 20 grams of a 52% solution of salt. she has two large bottles of salt water: one with 40% and the other with 70% of salt in them. how much of each must she use to make the solution she needs? i am in need of

240 seventh graders and two-thirds of the students participate in after-school activities how many students participate in after-school activities

The height, h, of a cylinder is 5 units less than 3times its radius, r. which expression represents the height of the cylinder in terms of its radius