Asequence is defined recursively by the formula f(n + 1) = f(n) + 3 . the first term of the sequence is –4. what is the next term in the sequence? –7–117
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