Solving equations and inequalities through substitution example 2

less than 1m read

·Nov 11, 2024

Mario started the day with five fire flowers. He used some, and now only has three left. If u is the number of flowers he's used, we can write the following equation: how many fire flowers did Mario use?

So, he started with five, he uses some of them, so we subtract the number he used and he ends up with three. There are a bunch of ways that you could do it. One way is you literally could probably do this in your head.

"Hey, I took away some number from five, and I got three!" You probably know, "Hey, well, if I take two away from five, I'm going to get three." So, he used two flowers.

The other way that you could think about doing it is, "Well hey, we got only four options here. Let me substitute each of them in here." Maybe I was able to do this one in my head, but if I had something more complicated, let me try out these choices.

So if he only took a zero away, it'd be five minus zero; he'd still, of course, be left with five. If he took one away, then of course he'd only have four left. If he took three away, he'd have two left. But if you took two away, five minus two is indeed three.

The third way you'll learn this as we go into more of how algebra works, and also the why, is that you could systematically solve it, but we'll go into that in future videos.

So, he used two fire flowers.

Graphing square and cube root functions | Algebra 2 | Khan academy

You’re reading wrong! 5 tips to become a better reader 📚

View All

Changes in Momentum Worked Examples | Momentum and Impulse | AP Physics 1 | Khan Academy

So here’s a pink ball rolling toward a green cube that’s sitting at rest on a frictionless surface. When the pink ball hits and slams into the green cube, it’s going to exert a force to the right on the green cube, and the green cube’s going to speed up. …

How to sell private jets to billionaires

This is a day in the life of a private jet broker. My day starts in a meeting with No. She’s an interior designer. We discussed renovating my fuselage. Nor presented intriguing designs for new lighting, new carpet, and even suggests adding a bed—a mini be…

Investors Said No, Now What?

Investor spends two minutes writing the email, and then later hears that you’ve pivoted your entire company because of it. Right? Not a huge signal of, uh, conviction. [Music] Hello, this is Michael with Harj and Brad. Welcome to Inside the Group Partne…

Ideologies of political parties in the United States | US government and civics | Khan Academy

What we’re going to do in this video is talk about the two major ideologies you will hear about in the United States, and that’s the liberal ideology and the conservative ideology. The liberal ideology is often associated with the Democratic Party, and t…

Quadratic systems: a line and a parabola | Equations | Algebra 2 | Khan Academy

We’re told the parabola given by ( y = 3x^2 - 6x + 1 ) and the line given by ( y - x + 1 = 0 ) are graphed. So you can see the parabola here in red and we can see the line here in blue. The first thing they ask us is, one intersection point is clearly id…

Men wrestle 8 point deer to save its life (buck)

Hey, bring the chainsaw back, huh? Bring the chainsaw back! You want to? Let’s both get over here and try to hold him. When you think about environmental conservation and sustainment, you probably don’t think about deer hunters, or that’s where you’d be …

Solving equations and inequalities through substitution example 2

More Articles