joliel3

It's good that you want an explanation instead of just an answer/wrong answer! ilorty also explained it well! Do you get the question now?

Aw that sucks... I hope you'll be able to upload your picture! 

Could you maybe include a link of what question you need help on? Thanks!

You know how to add, so why are you asking this?

Sorry, I can't see your diagram. It says it has been blocked by a moderator. 

Triangle Rule: The sum of the lengths of any two sides of a triangle must be greater than the third side.

1. Let's list all the sets. {8, 16, 21}{12, 17, 27}{8, 23, 31}{5, 8, 11}

2. Now is...

8+16 greater than 21?

12+17 greater than 27?

8+23 greater than 31?

5+8 greater than 11?

I'll leave that to you. 

1. 1/3 hr=4 1/2 km

If we want to get 1/3 hour to 1 hour, then we have to multiply by 3. Remember, if you do something to one side of the equation, you have to do it to the other side too for the equation to be true. Therefore, let's multiply 3 on both sides.

2. 3(1/3)hr=3(4 1/2)km=1hr=13 1/2 km

Answer: Nina can run 13 1/2 kilometers in one hour. 

1. Let's pretend that Alice's original size is 1.

2. After drinking one dose of shrinking potion...

1/2=1/2

After drinking another does of shrinking potion...

1/2/2=1/4

3. After eating a growth cake would be the same thing as multiplying 1/4 by 150%. What would you get? What would the final ratio be?

CPhill will be back after his break. :)

Sure!

1. So let's simplify (1+x)*(5+x)=(3+x)*(2+x) using the First Outer Inner Last method.

2. (1+x)*(5+x)...

First: 1*5=5

Outer: 1*x=x

Inner: x*5=5x

Last: x*x=x^2

Sum: 5+x+5x+x^2=6x+5+x^2

3. (3+x)*(2+x)...

First: 3*2=6

Outer: 3*x=3x

Inner: x*2=2x

Last: x*x=x^2

Sum: 6+3x+2x+x^2=5x+6+x^2

4. Rewrite equation as 6x+5+x^2=5x+6+x^2

5. Subtract 5 from both sides turning the equation into 6x+x^2=5x+1+x^2

6. Cancel out x^2 from both sides turning the equation into 6x=5x+1.

7. Subtract 5x from both sides and you get x=1.

Answer: x=1