The mean of four consecutive even numbers is 15. Enter each number separated by a comma. The numbers are .

12, 14 , 16, 18

Step-by-step explanation:

let the smallest of the numbers be n

since the numbers are consecutive and even, the numbers may be expressed as :

n (n+2) (n+4) (n + 6)

it is given that the mean of the 4 numbers is 15, hence the following formula applies

mean = (sum of all values )  ÷ number of values

it is given that the mean = 15

sum of values = n + (n+2) + (n+4) + (n + 6) = 4n + 12

hence the formula becomes:

15 = (4n+12) / 4

15(4) = 4n + 12

60 = 4n + 12

4n = 60 - 12

4n = 48

n = 48 / 4

n = 12

hence the numbers are

12, 14 , 16, 18

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

hope it

answer: $201

step-by-step explanation: to get the answer, you first get 3 nieces that he sold and multiply it by 67 and get $201, so he earned $201 selling his nieces.