A positive-sum game occurs a. when the sum of the two players' outcomes is positive. b. when the gains received by one player are exactly offset by the losses of the other. c. whenever the payoffs to the two players are equal. d. whenever any of the values in the payoff matrix are positive.

Solve this equation using substitution. {4x + y = −2} {4x + 6y = 44}

What are the greatest common factor of 75 and 30

The students at jefferson middle school are raising money for a charity by selling t-shirts and hats. the number of t-shirts sold was 3 times the number of hats. the profit was $5 for each t-shirt sold and $2.50 for each hat sold. the students raised $840 for the charity. they used the system below to analyze their success and found the solution to be (144, 48). 5x+2.50y=840 x=3y how much did they earn from t-shirt sales?