Find the sum. (5a+3b-6c)+(2a-4b+13c)

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

Solve the system of equations using the linear combination method. {4x−3y=127x−3y=3 enter your answers in the boxes.

The winner of a golf tournament made five putts for birdies. the lengths of these putts are in the table shown. what is the total distance of the putts in the yards, feet, and inches?