1- Solve the systems of equations with the following methods: -2x-y=-6 4x+8y=-24 a-Solve the system by using substitution

b-Solve the system by using elimination

Suppose you want just guess at the answers in a 5 question multiple-choice test. each question has 3 responses and only one is correct. what is the probability of getting two questions right just guessing? 20 points 0.3275 0.2753 0.7532 none of the above

What are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2

Are the corresponding angles congruent? explain why or why not.