Match the system of equations on the left with the appropriate solution on the right.

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.

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?

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)