Which ordered pair is a solution to the system of linear equations? `6x+5y=-7` `2x-4y=-8` A) (-1,3)
B) (-4,-2)
C)(-2,1)
D)(-1,3)

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