*10 POINTS* NOTE: Make sure to write this in a 2-step equation. (1 variable) (Variable on one side of equal sign)

If Joe's age is increased by four times his age, the result is 40. How old is Joe?

If the wwight of a package is multiplied by 7/10 the result is 65.8 find the weight of the package

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.

What is always true when two whole numbers are subtracted?