Raina had 506,211 paper clips. Her friend Ella had 424,809 paper clips. How many paper clips did thy have all together?
506,211+424,809=931,020
Answer: a) 10!/7!
<u>Step-by-step explanation:</u>
The "quick" way of answering this is: 10 × 9 × 8 = 720
If you are using the formula then you get:

17.91*21=376.11
i used one side of the triangle because both sides are equal