ShmoopTube

Where Monty Python meets your 10th grade teacher.

Search Thousands of Shmoop Videos

Solving Inequalities Using Addition, Subtraction, Multiplication, and Division 6305 Views


Share It!


Description:

Solving inequalities using blob fish? Yes, please!

Language:
English Language

Transcript

00:04

Solving Inequalities Using Addition, Subtraction, Multiplication and Division, a la Shmoop.

00:10

The local aquarium is throwing a Save the Blobfish fundraiser. [Man and little girl looking at fish in an aquarium]

00:13

No one cares about the poor blobfish...

00:16

Only cute animals get love. You and your friend want to save the blobfish. [Friends stood with a blobfish]

00:21

But no one else shows up.

00:23

Your oh so generous mom gave you $6 to contribute to the fund. She loves the blobfish. [Mother gives 6 dollars to save the blobfish]

00:28

Unfortunately, the fundraiser doesn't allow total donations more than $30, thanks to tax regulations.

00:35

What is the most amount of money you and your friend can each contribute?

00:40

We may not be able to save the blobfish... [Blobfish flushed down a toilet]

00:42

But we can solve this problem.

00:44

Let's let x be the maximum amount of money you and your friend can EACH contribute,

00:50

Since both of you are contributing x dollars, we can write that as 2x.

00:55

And don't forget your mom's generous $6 donation to the cause.

00:58

So the total we can contribute is 2x + 6.

01:04

BUT the maximum we can donate is $30, so 2x + 6 is less than or equal to 30. [Maths formula shown and Uncle Sam appears]

01:12

Now to solve this pressing issue.

01:15

First we'll subtract six from each side...

01:17

That leaves us with 2x is less than or equal to 24.

01:22

Now we need to divide both sides by two.

01:25

That gives us x is less than or equal to 12. So you and your friend can each contribute $12. [Two friends contributing 12 dollars to save blobfish]

01:32

You'll either have to get more friends to

01:34

donate money or ask the president to change the tax regulations. Good luck with that..

01:39

Starving blobfish in the Pacific need your help today. [Blobfish holding up a sign to work for krill]

Up Next

Simplifying Radicals
9737 Views

We don't like knocking people down to size, but we do like simplifying radicals. Join us?

Related Videos

Arithmetic Math
2248 Views

If fleeing criminals always fled the scene of the crime at perfect right angles, it would be much easier to determine their whereabouts. Fortunatel...

Basics of Game Theory
882 Views

Okay, so this probably isn't going to help you master Pokemon Go, but game theory can be applied to all sorts of situations. Even stomping your old...

Calculate Measures of Central Tendency for a Data Set Manually
862 Views

Today's video is about calculating central tendency. We'll lay out outliers and make means...meaningful.