9. Angola High School sold three times as many children's tickets as adult tickets for the school play. The total amount collected was
$357.50. Children's tickets cost $1.50 each, and adult tickets cost
$2.00 each. Which system of equations below could be used to
determine c, the number of children's tickets, and a, the number of
adult tickets, that were sold?

Solve the system by the elimination method. 2x + y - 4 = 0 2x - y - 4 = 0 when you eliminate y, what is the resulting equation? a.x = 0 b.4x = -8 c.4x = 8

Marco has $38.43 dollars in his checking account. his checking account is linked to his amazon music account so he can buy music. the songs he purchases cost $1.29. part 1: write an expression to describe the amount of money in his checking account in relationship to the number of songs he purchases. part 2: describe what the variable represents in this situation.

According to the data set, where should the upper quartile line of the box plot be placed?