8. In a poll of \( 82 \) people in her office, Leila found that on a regular basis \( 63 \) people consumed coffee, \( 22 \) people consumed tea, and \( 15 \) people did not consume either. Determine the number of people in Leila's poll who consumed both coffee and tea on a regular basis. [2]
Pregunta
Answer
let both =x
63-x+x+22-x+15=82
100-x=82
x= 18 people
Related Questions
Q:
Determine the following limits. If infinite, specify \( \infty \) or \( - \infty \) . If an answer does not exist, explain why. (NO POINTS WILL BE GIVEN IF A TABLE OF VALUES IS USED) b. \( \lim _ { x \rightarrow 1 ^ { + } } [ \frac { x } { x - 1 } + \frac { 1 } { \ln ( x ) } ]\)
Q:
9. A board game company models the profit on its latest board game using the quadratic relation
\( P = - 2 x ^ { 2 } + 28 x - 90 , \) where \( x \) is the number of games it produces in hundred thousands and \( P \) is the profit in millions of dollars.
a) What are the break-even points for the company?
b) What is the maximum profit that the company can earn?