Find the Slope

A. 2/5
B.5/2
C.-2/5
D.-5/2

What situation is an example of an observational study

Avery’s piggy bank has 300 nickels, 450 pennies, and 150 dimes. she randomly picks three coins. each time she picks a coin, she makes a note of it and puts it back into the piggy bank before picking the next coin.

You eat $0.85 for every cup of hot chocolate you sell. how many cups do you need to sell to earn $55.25