8. Marcos had \( 15 \) coins in nickels and quarlers. He had \( 3 \) more quarters than nickels. He wrote a system of equations to represent this situation, letting \( x \) represent the number of nickels and \( y \) represent the number of quarters. Then he solved the system by graphing. What is the solution?
Pregunta
Answer
x+y=15
(y-x)÷x=3
x=3 y=12
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?