I don't know much about functions, but this makes sense.

So our equation was right, we just couldn't figure out how to solve it.

are you allowed to just do that, though? Just put in a random value?

Some of the moderators could probably solve this.

I don't know, it's probably some complicated stuff that needs some sort of manipulation. I'm only a 6th grader doing 7th grade level math, and one who will be doing 9th grade level math next semester, okay?

I have no idea, but try this:

2(ax+b)-5 is supposed to equal 3x+4, right? From there, it is just algebra.

(don't send hate, I'm 11)

It is 5/7(as seen below)

I found it:

The only time the two numbers selected will not have a positive difference which is 2 or greater is when the two numbers are consecutive. There are 6 pairs of consecutive numbers in the set, and there are (\($\binom{7}{2}=21$\) pairs of numbers total. So, the probability that the pair of numbers chosen is not consecutive is 1-6/21=5/7.

I'm 11 and don't understand any of that, Rom.

I just typed your answer into a calculator and found that your answer was actually 9.99999-something!