Noel bought 4 T-shirts and 2 pairs of pants for $92. The cost of each pair of pants is $22. If all the T-shirts cost the same amount, the cost of each T-shirt is $

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