Like fractions, rational expressions can be added, subtracted, multiplied, and divided.
When dealing with two rational expressions that
have different denominators, how would you find
a common denominator? What effect would that
have on the numerators of the expressions?
Would the same idea work for simple numeric
fractions? Why or why not?
Given two rational expressions, how would the
process you follow to multiply or divide them differ
from multiplying or dividing two numeric fractions?

Ascientist studied a population of workers to determine whether verbal praise and/or tangible rewards affect employee productivity. in the study, some workers were offered verbal praise, some were offered tangible rewards (gift cards, presents, and some were offered neither. the productivity of each participant was measured throughout the study by recording the number of daily tasks completed by each employee. which inference might the scientists make based on the given information? a.) the number of daily tasks completed by each employee may influence the dependent variable, which is whether the employee receives verbal praise, tangible rewards, or neither. b.) verbal praise and/or tangible rewards may influence the independent variable, which is the number of daily tasks completed by each employee. c.) verbal praise and/or tangible rewards may influence the dependent variable, which is the number of daily tasks completed by each employee. d.) the dependent variables, which are verbal praise and tangible rewards, may influence the number of daily tasks completed by each employee.