How many solutions exist for the following system of equations: 4x + y = 7 and 3x - y = 0 a. no solution b. one solution c. infinitely many d. cannot be determined

Why did the ice arena get so hot after the big game (this is math related google it to find the paper

What is the number 321,000,000 in scientific notation? also what is the number? ?

Which of the following correctly justifies statement four of the two column proof? a. corresponding angles theorem b. transitive property of equality c. vertical angle theorem d. substitution property of equality