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SAT Math 2.1 Algebra and Functions
272 Views

SAT Math 2.1 Algebra and Functions. What is g(h(4))?

SAT Math 2.3 Algebra and Functions
206 Views

SAT Math 2.3 Algebra and Functions. Calculate this function.

SAT Math 5.2 Algebra and Functions
200 Views

SAT Math 5.2 Algebra and Functions

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SAT Math 2.1 Algebra and Functions 272 Views


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Description:

SAT Math 2.1 Algebra and Functions. What is g(h(4))?

Language:
English Language

Transcript

00:01

getting schmoopy with it yeah if G of N equals four N squared minus nine and H [text on screen]

00:07

of N equals the square root of n what is the G of H of four and here the

00:15

potential answers ah the suspense okay there's a lot of info crammed into this

00:20

thing but really all we have to know is what G of H of four is notice the

00:26

excessive number of parentheses in this problem as always we start with the [colorful googly-eyed parenthesis]

00:32

innermost set of parentheses H of four the problem tells us that H of any [formulas on screen]

00:37

number n is equal to the square root of n any number is equal to four so let's

00:44

plug in 4 for n the square root of four is two so if H of 4 is equal to two then

00:51

we can replace H of four with two in the equation our new equation is G of two

00:56

the problem tells us that G of n is equal to four N squared minus nine and

01:01

since we said that our new equation is G of two we can replace n with two the

01:07

four times two squared minus nine we get four times four which is equal to 16 16

01:13

minus 9 equals seven and were there C is our guy [answer C is circled]

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