Can someone please teach me this in an easier, less difficult way.

PLEASE

Step-by-step explanation:

The expression is used to denote the number of ways you can choose things from a set of things. It is equal to:

In this case, and , so:

You can also think of it like this:

is saying 9 choose 2. We are choosing 2 things from a set of 9 things, where order doesn't matter. For the first thing we choose, there are 9 options. Then 8 options, 7, and so on. Since we're only choosing two things, there are permutations. However, the order of which we choose each thing does not affect what we've chosen overall (e.g. If we're choosing two donut flavors original and strawberry, it doesn't matter which flavor I choose first, because I'm still getting the same two flavors). Therefore, we must divide this by the number of ways we can arrange two distinct values, which is . Our answer is thus

sum= when you add is how much the whole amount is

distance= when you use angles and it means how far it goes

step-by-step explanation:

sorry can't

step-by-step explanation:

i googled though and something came up but it was in science langueage not common english sooo