What is the area of a parallelogram if the coordinates of its vertices are (-4, -1), (-2, 4), (4, 4), and (2, -1)? a. 12 b. 30 c. 20 d. 15

What is the result of adding the system of equations? 2x+y=4 3x-y=6

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

In an equilateral triangle, each angle is represented by 5y+3. what is the value of y? a. 9.7 b. 10.8 c. 11.4 d. 7.2