Amy paid $17.50 to buy 6 youth tickets and 1 adult ticket to a school carnival. Karlie paid
$22.50 to buy 3 youth tickets and 3 adult tickets at the carnival.
What was the price of an
adult ticket?

6y + a = 17.5

3y + 3a = 22.5

-2(3y + 3a) = 22.5(-2)

 -6y - 6a = -45

+ 6y + a = 17.5

        -5a = -27.5

            a = 5.50

Step-by-step explanation:

y=−9/2x+10

step-by-step explanation:

let's solve for y.

0−9x−2y=−20

step 1: add 9x to both sides.

−9x−2y+9x=−20+9x

−2y=9x−20

step 2: divide both sides by -2.

−2y

−2

=

9x−20

−2

y=

−9

2

x+10

after simplifying it i got: -36.25 as my answer. hope that !