Can someone me with these step by step?
4p+2p=3p-7
3n-5=7n+11
-3c-12=-5c+c
7 (6-2a)=5 (-3a+1)
2r-(5-r)=13+2r
2 (a-4)=4a-(2a+4)
5y+2=1/2 (10y+4)
-6a+3=-3 (2a-1)

Neveah and clint are baking muffins for the bake sale. they need to bake 30 muffins for their display case. clint has baked 4 so far, and neveah has baked 7. how many muffins (m) do they have left to bake? show your work!

(! ) three cylinders have a height of 8 cm. cylinder 1 has a radius of 1 cm. cylinder 2 has a radius of 2 cm. cylinder 3 has a radius of 3 cm. find the volume of each cylinder

Barbara deposited $300 in the bank. if the bank pays her simple interest at the rate of 4 percent per year, how much money will she have in her account at the end of 9 months?