Which system of equations is equivalent to the following system? 4x + y = 4
2x + 7y = 28

4x + y = 4
−2x − 7y = 28
4x + y = 4
−8x − 28y = 112
−28x − 7y = −28
2x + 7y = 28
−8x − 2y = 8
2x + 7y = 28

Write a polynomial function f of least degree that has rational coefficients, a leading coefficient of 1, and the given zeros. 3, 4+2i, 1+(sqrt)7 the answer is supposed to be: f(x)=x(^5)-13x(^4)+60x(^3)-82x(^2)- 144x+360 what am i doing wrong?

Which of the following shows the length of the third side, in inches, of the triangle below

What is the distance between a and b? round your answer to the nearest tenth. a coordinate plane is shown. point a is located at negative 1, 5, and point b is located at 4, 1. a line segment connects the two points.