7:
The mean of six numbers is 25.

Three of the numbers are 15,15 and 30.

The second unknown number is twice the first unknown number, and third unknown number is twice the sum of the first two unknown numbers.

Find the unknown numbers.
Select all that apply.
A
12
B
10
C
60
D
25
E
20
F
30
G
5

(B) (C) (E)

Step-by-step explanation:

15, 15, 30 = 60

The 3 numbers sum is equal to 90

first number uknown = x

seconds unknown number = y

third unkown number = z

2x = y

2x + 2y = z

2x + 2(2x) = z

2x + 4x = z

6x = z

x + 2x + 6x = 90

9x = 90

× = 10

2× = y

20 = y

6x = y

60 = y

10, 20, 60

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step-by-step explanation: