Tom sells apples for .35 cents. how much does he earn selling two dozen apples

Aresearch company wants to test the claim that a new multivitamin to improve short term memory. state the objective of the experiment, suggest a population, determine the experimental and control groups, and describe a sample procedure.

There were 25 students who answered to a survey about sports. four-fifths of them like football. how many students like football?

Idon't get undoing if its pass adding and subtracting so can someone ? x-2 over 5 = 18