Joe can type 60 words per minute how long will it take him to type 4800 words

The triangles are similar. what is the value of x? x=

If c(x) = 4x – 2 and d(x) = x2 + 5x, what is (cxd)(x)

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?