Calculate the mean and median for the set of numbers:
12,88,89,90

Median: 88.5

Mean: 69.75

Step-by-step explanation:

Mean: add all numbers and divide by the amount of numbers.

Median: find the center most number. If none exist, take the two center most numbers and divide them by 2.

Mean: 12+88+89+90

279/4

69.75

Median:

(88+89)/2

177/2

88.5

answer: bea's uncle is 25 years old.

step-by-step explanation:

given the equation , we can say that the variable "x" represents the age of bea's uncle. then to find his age, we need to solve for "x":

we must add 15 to both sides of the equation:

now we need to divide both sides of the equation by 3:

therefore, we can conclude that bea's uncle is 25 years old.