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ACT Math: Plane Geometry Drill 3, Problem 1. What is the area of the trapezoid shape in the video?
ACT Math Pre-Algebra Drill 2, Problem 5. Given the chart in the video, what is the mode?
ACT Math 3.5 Elementary Algebra 243 Views
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Description:
ACT Math: Elementary Algebra Drill 3.5. Simplify the expression.
ACT Math: Elementary Algebra Drill 3.5. Simplify the expression.
Transcript
- 00:03
Here's your shmoop du jour:
- 00:05
Simplify: a cubed times b to the fourth over a squared times b squared.
- 00:09
And here are the potential answers...
- 00:14
OK. It's about division of exponents: do we realize we can subtract?
- 00:19
So with a cubed over a squared, we can subtract 3 minus 2 and the a in the denominator just
Full Transcript
- 00:24
goes away.
- 00:26
So we just have a in the numerator.
- 00:28
Now let's deal with b.
- 00:29
b to the 4th can subtract b squared and we have b squared remaining in the numerator.
- 00:36
So the whole problem simplifies to a times b squared.
- 00:39
Answer: A.
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