Let f(x) = 4x - 7 and g(x) = 2x - 3. find (f. g) (4)

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

Yo y do yall have 2 stars that means yall wrong bro

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