Is there any tutors anymore on or did they cancel them?

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?

Ab and bc are tangent to circle d. find x is ab = 3x + 8 and bc = 26. find x

What is the benefit of converting measures in a ratio to the same unit