Which of these r-values represents the weakest correlation
A 0.6
B 0.3
C 0.5
D 0.4

Using the quadratic formula find the zeros of the given polynomial -5x^2+3x-11

How do you use the elimination method for this question? explain, because i really want to understand!

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