Which of the following pairs of numbers contain like fractions?
a. 31/2 and 43/4
b. 5/6 and 10/12
c. 3/2 and 2/3
d. 6/7 and 15/7

Which of the following is true for the relation f(x)=2x^2+1

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?

Solve 2 - 3 cos x = 5 + 3 cos x for 0° ≤ x ≤ 180° a. 150° b. 30° c. 60° d. 120°