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. :)
The answer is D. Trust me.
Answer:
25.12
Step-by-step explanation:
So, we have x=√8x. The square root is a number times itself, so x=√x*x. That means that 8 is x.
