Final answer:
To assess if Mrs. Davis and her 2 sisters can get their hair colored for less than $100 including a $10 tip, we need the cost of a single hair coloring service. The total cost is calculated by the equation '3x + 10 < 100'. Without the value of 'x', the correct answer is 'c) Not enough information'.
Step-by-step explanation:
The question "Can Mrs. Davis and her 2 sisters get their hair colored for less than $100 if they include a $10 tip?" involves basic arithmetic to determine whether the budget allows for the hair coloring service including the tip. To solve this, we need the cost of hair coloring for one person and then multiply that by three, because there are three people getting their hair colored. If we're including a tip, we add that to the total cost.
Without the specific cost of hair coloring, however, we cannot determine the exact total cost. Assuming the cost for one person's hair coloring is represented as 'x', the total cost for three people would be '3x'. If we add the $10 tip, the equation to represent the total expense would be '3x + 10'.
The condition for Mrs. Davis and her 2 sisters to get their hair colored for less than $100, including the tip, is that '3x + 10 < 100'. Without knowing the value of 'x', it is impossible to provide a definitive answer, so the correct option would be 'c) Not enough information'.