suppose a triangle has sides a b and c and let theta be the angle opposite the side of length a if cos theta>0 what must be true

Translate the word phrase into a math expression. 15 fewer than the product of 4 and a number. (pls immediately)

The area of a rectangle is 15+5y square feet. which of the following expressions could be the length of the sides of the rectangle, in feet a. 5 and 3y b. 5 and 3+y c. 5 and 5+y d. 3 and 5+3y

Consider the function f(x)=-5x+3 what is f(-2)