If A= 4 2 -7 -3 and B= -3 4 -1 5 what is the solution to the equation ax=b

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

5. (04.07)which of the following exponential functions goes through the points (1, 12) and (2, 36)? (2 points)f(x) = 3(4)^xf(x) = 4(3)^-xf(x) = 3(4)^-xf(x) = 4(3)^x

An equation in slope-intersept form the lines that passes thought (-8,1) and is perpindicular to the y=2x-17.