How many solutions does the system of linear equations have?

y= x + 7

y = x - 8

What number should be added to both sides of the equation to complete this square? x^2-10x=7

How do you convert 1.27 to a percentage

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?