The numbers x, y, z and w have an average equal to 25. The average of x, y and z is equal to 27. Find w.
A. 23
B. 19
C. 25 D. 29​

The function ƒ is defined by ƒ(x) = (x + 3)(x + 1). the graph of ƒ in the xy-plane is a parabola. which interval contains the x-coordinate of the vertex of the graph of ƒ?

Last month, a 770 g box of cereal was sold at a grocery store for $3.10. however, this month, the cereal manufacturer launched the same cereal in a 640 g box, which is being sold at $2.50. what is the percent change in the unit price?

Ab and bc are tangent to circle d. find x is ab = 3x + 8 and bc = 26. find x