Alyaa gets 15 signatures each day for 12 day. one the thirteenth day alyaa get 55 signatures. alyaa is trying to get 500 signatures for a petition. how many more signatures does she need to meet her goal.
give u 2000 points !

Okay dso if she got 15 points for 12 days then you would multiply them (or just add 15+15+15+15 and so on but multiplying is easier) then you are going to add 55 because of the thirteenth day. 
15(12)=180
180+55=235 is how many you have.
now you are going to subtract 500 from that number to see how many more you need. :)

Iknow one of the answers is a and maybe b but not 100% sure about b