To encourage bob to work his math problems correctly, his dad said he'd pay him 10 cents for each correct answer and charge him 5 cents for each incorrect answer. if he received a dime after doing 25 problems, how many problems did bob get right?

Answer question above and explain each step : )

()1. how do you find range? 2.the following set of data is to be organized into a histogram. if there are to be five intervals on the graph, what should the length of each interval be? 30, 34, 23, 21, 27, 25, 29, 29, 25, 23, 32, 31

The graph and table shows the relationship between y, the number of words jean has typed for her essay and x, the number of minutes she has been typing on the computer. according to the line of best fit, about how many words will jean have typed when she completes 60 minutes of typing? 2,500 2,750 3,000 3,250