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Playlist ACT® Intermediate Algebra 25 videos

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ACT Math 1.1 Intermediate Algebra
320 Views

ACT Math Intermediate Algebra Drill 1, Problem 1. What is the product of (a – 3)2?

1
ACT Math 1.2 Intermediate Algebra
695 Views

ACT Math Intermediate Algebra Drill 1, Problem 2. Find the product of (2a + 6)2.

2
ACT Math 1.3 Intermediate Algebra
506 Views

ACT Math Intermediate Algebra Drill 1, Problem 3. Can you find the value of a in this expression?

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ACT Math 5.4 Intermediate Algebra 691 Views


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Description:

ACT Math: Intermediate Algebra: Drill 5, Problem 4. Which expression is equivalent?

Language:
English Language

Transcript

00:02

Try this shmoopy question on for size.

00:05

Which expression is equivalent to x cubed equals 48?

00:08

And here are the potential answers...

00:12

OKay, The most important part of this problem is understanding the relationship between logarithms

00:17

and exponents.

00:21

If a to the b power equals x, then log base a of x...equals...b.

00:31

In this case, the base of the exponent is x, so the base of the logarithm must be x.

00:38

That leaves us with C or D. The exponent is 3...so we know the answer must be C.

00:42

Answer D would only be correct if we had x to the 48th power equals 3.

00:47

But we don't have that. So the answer is C

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