Divide both sides by 2.1
2.1d/2.1 = 51.24/2.1
And then your answer!
d = 24.4
5n+3/4n=2
20n+3n/4=2
23n/4=2
23n=8
n=8/23
Answer: D
Step-by-step explanation:
Answer: The answer would be B.
Answer:
A: 171.75
B: 170
Step-by-step explanation:
The mean (or average) can be found by...
- add all the numbers together (we will call this y)
- divide the total sum (or y) by the total amount of numbers used to add
Formula:
(x₁ + x₂ + x₃ + ... + xₙ) ÷ n
For A:
(172 + 130 + 173 + 212) ÷ 4 = 171.75
For B:
(136 + 184 + 168 + 192) ÷ 4 = 170
