What is the value of x squared =169

What is the result of adding the system of equations? 2x+y=4 3x-y=6

Which of the following is an equation of a line parallel to the equation y=4x+1?

Sanderson is having trouble with his assignment. his shown work is as follows: − 3 7 7 3 = − 3 7 × 7 3 = − 21 21 = −1 however, his answer does not match the answer that his teacher gives him. complete the description of sanderson's mistake. find the correct answer.