The substitution method should be used to solve which system of equations?
a) 5x – 7y = 16
2x – 7y = 12
b) 4x + 3y = -5
6x – 3y = 2
c) x = 3y + 1
2x + y = 7
d) 2x + y = 3
3x + 2y = -1

Which of the following is true for the relation f(x)=2x^2+1

Select the correct answer from each drop-down menu. a system of equations and its solution are given below. system a complete the sentences to explain what steps were followed to obtain the system of equations below. system b to get system b, the equation in system a was replaced by the sum of that equation and times the equation. the solution to system b the same as the solution to system a.]

1. 2. ∠b and ∠y are right angles. 3.? 4.? which two statements are missing in steps 3 and 4? ∠x ≅ ∠c △abc ~ △zyx by the sas similarity theorem. ∠b ≅ ∠y △abc ~ △zyx by the sas similarity theorem. = 2 △abc ~ △zyx by the sss similarity theorem. = 2 △abc ~ △zyx by the sss similarity theorem.