Answer:
D. 100
Step-by-step explanation:
Mean = Sum of all numbers divided by the count of all numbers
Mean = 50
Let say that the sum of all numbers = X
50 = X / 4
200 = X
X = (20+30+50) + The 4th Value
200 = 100 + 4th Value
The 4th Value = 100
That's two questions.
The answer to the second question is: Yes.
The answer to the first question is:
Multiply 60 miles per hour by ' 1 ' a few times. Use fractions that have
the same thing on top and bottom, since those are always equal to ' 1 '.
Then cancel units if the same unit is on the top and the bottom.
Here's how it goes:
(60 mi/hr) x (5280 ft/mile) x (1hr/3600 sec) = (60 x 5280 / 3600) ft/sec = <u>88 ft/sec</u>
16 wide
Step-by-step explanation:
because i do 8 x 2
Answer:

Step-by-step explanation:
1) Divide both sides by 2.

2) Simplify 4/2 to 2.

3) Add 4 to both sides.

4) Simplify 2 + 4 to 6.

5) Divide both sides by 2.

6) Simplify 6/2 to 3.

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