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SAT Math 9.2 Algebra and Functions
377 Views

SAT Math 9.2 Algebra and Functions

SAT Math 9.4 Algebra and Functions
1300 Views

SAT Math 9.4 Algebra and Functions

Multiplying Polynomials to Find an Unknown Constant
3 Views

In the equation above, if a, b, and c are all constants, what is c?

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SAT Math 5.2 Algebra and Functions 200 Views


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Description:

SAT Math 5.2 Algebra and Functions

Language:
English Language

Transcript

00:02

And here's your shmoop du jour...

00:04

If g(n) = 4n squared - 9 and h(n) = the square root of n,

00:10

what is g of h of n?

00:14

Here are the possible answers...

00:18

g of h of n? No, those parentheses aren't just there to distract us.

00:26

Actually, they tell us we're working with composite functions.

00:30

To solve this problem, we need to plug h of n in for the n in the g of n equation:

00:37

to get 4 times the square root of n squared minus 9.

00:40

The square root of n squared simplifies to n...

00:44

so our equation becomes g of h of n equals 4n minus 9.

00:49

Looks like our answer's B.

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