Please help I'm confused with what to put in those boxes

Kevin has a spinner that has 10 equal sections and 2 sections of each color—red, blue, green, yellow, and purple. kevin spins the spinner 180 times. kevin determines about how many times the spinner will land on red or green, and his work is shown below. -kevin has the formula reversed; it should be the total number of sections over the number of red or green sections. -kevin should have used a 4 in the numerator because there are 2 red sections and 2 green sections. -kevin should multiply by the number of sections in the spinner rather than the total number of spins. -kevin calculated the prediction correctly and did not make any mistakes.

What is the common difference in the arithmetic sequence? 7, 14, 21, 28, 2 3 4 7

The eagle club wants to build a chain of 2,505 dominoes. if they have already set up 807 dominoes, how many more do they need to add to meet their goal?