ShmoopTube

Where Monty Python meets your 10th grade teacher.

Search Thousands of Shmoop Videos


Playlist Algebra and Functions Test Questions 74 videos

0
SAT Math 1.2 Algebra and Functions
359 Views

SAT Math: Algebra and Functions Drill 1, Problem 2. Based on the data in the table, what is the maximum heart rate for the average 22-year-old?

1
SAT Math 2.1 Algebra and Functions
272 Views

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

2
SAT Math 2.3 Algebra and Functions
206 Views

SAT Math 2.3 Algebra and Functions. Calculate this function.

See All

SAT Math 2.1 Algebra and Functions 272 Views


Share It!


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]

Related Videos

SAT Math 2.1 Geometry and Measurement
2779 Views

SAT Math 2.1 Geometry and Measurement. What is the measure of angle z in terms of x and y?

SAT Math 9.4 Algebra and Functions
1300 Views

SAT Math 9.4 Algebra and Functions

SAT Math 9.2 Algebra and Functions
377 Views

SAT Math 9.2 Algebra and Functions

SAT Math: Identifying an Equation for the Average of Two Percentages
23 Views

In 2014, the unemployment rate of one county in California was 7%. In another county, the unemployment rate was 11%. Which of the following express...

SAT Math: Which Equation Represents Profit?
13 Views

Angela is making cookies for a bake sale. She expects each batch of her cookies to sell for $40. It costs her $10 to make one batch of cookies, and...