If 15 + x,28 – x, and 29 + x form an arithmetic sequence what is the value of x?

3.

Step-by-step explanation:

If its an AS it well have a common difference, so 3rd term - 2nd term should = 2nd term - first term:-

29 + x - (28 - x) =  28 - x - (15 + x)

2x + 1 = 13 - 2x

4x = 12

x = 3.

The sequence is

15 + 3, 28-3, 29 + 3

= 18, 25, 32

which is arithmetic with common difference 7.

56.6

step-by-step explanation:

the ratio of the perimeters is equal to the scale.

the ratio of the areas is equal to the square of the scale.

34 / 20 = k

a / 19.6 = k²

substituting:

a / 19.6 = (34 / 20)²

a = 19.6 (34 / 20)²

a ≈ 56.6

answer: he is 272195

step-by-step explanation: all you have to do is multiple 3535 and 77 and it equals 272195