6x + 3y = 63
2x - 6y = 14
How do I solve by substitution step by step?

Find the values of y: 3y^3(y^2+ 2/3y)=0

What is the total area of the figure?

Atest consists of 10 multiple choice questions, each with 5 possible answers, one of which is correct. to pass the test a student must get 60% or better on the test. if a student randomly guesses, what is the probability that the student will pass the test?