If sin θ > 0 and tan θ < 0, then the terminal side of angle θ lies in quadrant a) I
b) II
c) III
d) IV

What is the value of x in the equation 2(x-4) = 4(2x + 1)?

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16

Prove the converse of the pythagorean theorem using similar triangles. the converse of the pythagorean theorem states that when the sum of the squares of the lengths of the legs of the triangle equals the squares length of the hypotenuse, the triangle is a right triangle. be sure to create and name the appropriate geometric figures.