Nick goes to the mall. He purchased some clothes and toys for $140. He purchased the clothes for $60. He also bought 2 toy planes. Both planes cost the same amount. Write
an equation to help you determine the price of one plane.
What is the cost of 1 plane?
Pls help asap

3.17 scores on stats final. below are final exam scores of 20 introductory statistics students. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 57, 66, 69, 71, 72, 73, 74, 77, 78, 78, 79, 79, 81, 81, 82, 83, 83, 88, 89, 94 (a) the mean score is 77.7 points. with a standard deviation of 8.44 points. use this information to determine if the scores approximately follow the 68-95-99.7% rule. (b) do these data appear to follow a normal distribution? explain your reasoning using the graphs provided below.

Hello, i need compare km^2 and km. what's difference in this?

Me i’m stuck on all these questions besides the two bottom ones