hahaiwannadie
18.03.2020 •
Mathematics
The average of 5, 10, 15, and z is 20. What is z?
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Ответ:
50
Step-by-step explanation:
Step 1:
5 + 10 + 15 + z / 4 = 20 Equation
Step 2:
30 + z / 4 = 20 Combine Like Terms
Step 3:
30 + z = 20 × 4 Multiply 4 on both sides
Step 4:
z = 80 - 30 Subtract 30 on both sides
z = 50
Hope This Helps :)
Ответ:
B.(-5,∞)
Step-by-step explanation: