When I started my rock collection I had 8 rocks. Over the summer I collected 48 additional rocks. At the end of the summer I gave away some of my favorite rocks to friends, but I still have 49 rocks left. Which equation could I use to find out how many rocks I gave away to friends?

Subtraction

Step-by-step explanation:

56 - 49 = 7

7 rocks

Hope this helped!

third option: 6x+8

step-by-step explanation:

we can see that the given question is a sum of series and the values of n vary from 0 to 3

the first term will be:

when n=0, [(0)*x+2] => (0+2) => 2

when n=1, [(1)*x+2] => (x+2) => x+2

when n=2, [(2)*x+2] => 2x+2

when n=4, [(3)*x+2] => 3x+2

so adding up all the terms will give us:

=2+x+2+2x+2+3x+2

=x+2x+3x+2+2+2+2

=6x+8

so,

third option is the correct answer ..

deez nu tz

step-by-step explanation: