Question

The octane rating of a gasoline is a measure of the amount of isooctane in the gas. Manufacturers recommend using 93-octane gasoline on returned motors. How much 87-octane gas and 95 octane gas should Yousef mix in order to make 10 gal of 93 octane gas for his returned Ford F-150?

Answer 1

Hello again, I would like to know how to figure out how to make the equation, then solve

Answer 2

Hey!

We have t make 93 octane and 10 gallons.
so our total amount will be 0.93*10.

Answer 3

Moving along:

total gallons will be 10. so 0.95(10-x)

Final equation:

0.87x + 0.95(10-x) = 0.93*10

Answer 4

There's one more method too if this looks hard to you. Let me know if this is hard to understand.

Answer 5

This method looked a bit more difficult than the latter, do you have an easier method?

Answer 6

x + y = 10

87x + 95y = 93*10

Answer 7

I see, I was trying to figure out how you know what goes where?

Answer 8

Haha. I don't know. I should ask that from my brain! :D

Answer 9

You are funny! Thank you! I have so much homework to catch up on!I am behind quite a bit, the class is already on Matrices and also sqrt[?]{?}.... I am VERY behind!

Answer 10

Lol. You're welcome.

Oh! Matrices can be boring.
Square roots are fun!

Answer 11

I don't know why but my equation seems wrong...
x+y=2
4x+y=5
x=-y+5
-4y+20+y=5
-3y+20=5
-3y=-20+5
-3y=-15
-3y/-3=-15/-3
y=5
x=-5+5
x=0???

Answer 12

What's the main question?

Answer 13

How much lowfat milk(1% fat) and how much whole milk(4% fat) should be mixed to make 5 gal of reduced fat milk (2% fat)?

Answer 14

x + y = 5

0.01x + 0.04y = 0.02*5

Answer 15

Hmmm... how do you know what to put where?

Answer 16

It's pretty simple.

For equation 1.
find the total amount.
it will be x+y = 5(total gallons)

Answer 17

Maybe so simple that I over think and get confused! LOL

Answer 18

for equation 2.
Now we have 3 values left.
1%, 4% and 2%

We have to make 2%

so:

0.01x + 0.04y = 0.02 *5

*5 because total are 5 gals.

Answer 19

I see....

Answer 20

Lol, it happens.

Answer 21

Where are you located Saifoo? I am so glad you grabbed my questions!

Answer 22

Lol. I'm located in another continent. Way far from US.
I'm from Pakistan.

Answer 23

Wow... You speak and write English very well! Are you Pakistani or Indian?
I am just curious... It is funny how the internet connects people, and we can find common ground and learn from one another....

Answer 24

Are you in Pakistan now? It is day there I imagine... It is late here in Indiana where I live in the U.S.

Answer 25

No. I'm a Pakistani. Living in Pakistan currently! :D
Hehe. Yup. This world is shorter now. People can connect in seconds.

It's 8:14am here. And i should be heading to bed soon. Haven't slept the whole night. :/
Been studying for exams.

Answer 26

It is very cool to meet someone in another country, again I am glad to know you!

Answer 27

A 17 year old teaching a 43 year old! WONDERFUL!!! :-D

Answer 28

Same here. :)

Answer 29

Haha. Learning anything has no limits.

Answer 30

Well get some rest, I hope that you are okay with helping me, thank you so much sweetie!

Answer 31

Yup! Going in 5mins. If my mom sees me awake, i'm dead. D:
Yes, sure. Knock me if you need any help. You're welcome ma'am.

Answer 32

Hey my Facebook is
Susan-Jaxie Marie Hanna-Jackson, friend me if you would like! I look forward to learning more from you! Thank you so much again!!!

Answer 33

just sent you a request.
You're welcome. :)