Question 10 of 25 If f(x) = -4x2 - 6x-1 and g(x) = -x2 - 5x+3, find (f-(%)
O A. (1-9)(x) = -3x2 - x-4
O B. (- 9)(x) = 3x2 + x + 4
O C. (1-9)(x) = 5x2 + x + 2
O D. (1-9)(x) = -3x2 - 11X+2
SUBMIT

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