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ACT Math: Coordinate Geometry Drill 1, Problem 1. Which inequality is expressed by the number line?
ACT Math Intermediate Algebra Drill 1, Problem 5. Can you simplify the expression?
ACT Math Intermediate Algebra Drill 2, Problem 1. Solve the equation.
ACT Math 1.5 Pre-Algebra 311 Views
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ACT Math Pre-Algebra Drill 1, Problem 5. Can you find the mean?
ACT Math Pre-Algebra Drill 1, Problem 5. Can you find the mean?
Transcript
- 00:03
Time for your daily dose of shmoop... Open wide!
- 00:07
Find the mean of the following numbers: 37,
- 00:09
38, 45, 67, 23, 81. And here are the potential answers...
- 00:18
This... is nice.
- 00:20
This... is mean.
Full Transcript
- 00:23
But we're talking about mean in mathematical terms... here, it's just a fancy word for average.
- 00:27
To calculate averages, we first add the numbers...
- 00:30
...to get a total of 291
- 00:33
Since there were 6 numbers, we divide by 6.
- 00:39
So 6 goes into 29 four times, leaving 5... then 6 goes into 51 eight times, leaving 3...
- 00:48
so we have 48 and 3 sixths... or 48 and a half... or 48.5.
- 00:55
So the answer is B.
- 00:57
As in, "Baby needs another nap."
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