A friend has a 78% average before the final exam for a course. That score includes everything but the final, which counts for 20% of the course grade.

What is the best course grade your friend can earn?

Solve this equation using substitution. {4x + y = −2} {4x + 6y = 44}

How do the definitions, properties, and postulates you've learned about line segments, parallel lines, and angles to define the shapes of polygons

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