In triangle ABC, a = 4, b = 6, and cos C = -1/4. What is the length of side c?

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²

The width of a rectangle is 20 units. can the perimeter p of the rectangle be 64 units when its length x is 11 units? no, because p = 2x + 2(20) no, because p ≠ 2x + 2(20) yes, because p ≠ 2x + 2(20) yes, because p = 2x + 2(20)

Julian wrote the following numeric pattern on the board3,10,17,24,31,38.what numbers of julian's pattern are compound numbers.