ShmoopTube

Where Monty Python meets your 10th grade teacher.

Search Thousands of Shmoop Videos


Playlist Algebra and Functions Test Questions 74 videos

0
CAHSEE Math 1.1 Algebra and Functions
291 Views

CAHSEE Math Algebra and Functions: Drill Set 1, Problem 1. At this rate, what is the total cost of 10 songs?

1
CAHSEE Math 1.2 Algebra and Functions
760 Views

CAHSEE Math Algebra and Functions: Drill Set 1, Problem 2. Which of the following represents the statement?

2
CAHSEE Math 1.3 Algebra and Functions
228 Views

CAHSEE Math: Algebra and Functions: Drill Set 1, Problem 3. What equation fits the description?

See All

SAT Math 8.5 Algebra and Functions 214 Views


Share It!


Description:

SAT Math 8.5 Algebra and Functions

Language:
English Language

Transcript

00:02

Buckle up! It's question time.

00:05

When you square a certain number, the result is equal to ten times the number plus the number again.

00:11

What is the number?

00:14

Another equation given to us in words that we have to translate to numbers…

00:18

Let’s call the number we’re looking for x.

00:21

Squaring x gives us x squared… …which equals ten times the number…

00:25

10x…plus the number again…so PLUS x.

00:30

We can write this as the equation x squared equals 11x.

00:34

What number squared equals 11 times that number?

00:39

We can solve the problem with a little logic. Well…it must be 11…

00:42

See how it works. 11 times 11 is 121. 11 squared is 121 and they equal each other.

00:49

If we weren’t sure though, x squared is the same as x times x…

00:53

…so we can simply divide x from both sides. The correct answer is 11 and we're done!

Related Videos

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 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: 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...