Operaciones con numeros reales suma ejemplos

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

Asquare and an equilateral triangle have the same perimeter. each side the triangle is 4 inches longer than each side of the square. what is the perimeter of the square

Jane’s favorite fruit punch consists of pear, pineapple, and plum juices in the ratio 5: 2: 3. how many cups of pear juice should she use to make 20 cups of punch?