Ineed this is my project i have to do

•the problem
•the correct equation
•the answer
•step by step

!
20 points

Anne is twice as old as bill, and bill is 3 years older than christie. the sum of anne s and christie s ages equal 72. find their age difference.?

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.

Human body temperatures have a mean of 98.20° f and a standard deviation of 0.62°. sally's temperature can be described by z = 1.4. what is her temperature? round your answer to the nearest hundredth. 99.07°f 97.33°f 99.60°f 100.45°f