Find the SS and mean of 12, 11,10,9,8 7,6,5 and 8,7,6,5,4,3,2,1​

What is the slope simplify your answer and write it as a proper fraction, improper fraction, or integer

You eat 8 strawberries and your friend eats 12 strawberries from a bowl. there are 20 strawberries left. which equation and solution give the original number of strawberries?

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much