2x - 4y= 3
7y - 5x= 8
On a graph

Parabola

Step-by-step explanation: 7y - 5x = 8 Lets look closely at this equation. At parabola graph you can make it by downing the y on circumstances of the upline, towards middle, that will make you a perfect graph

75 tickets have been sold so far.

step-by-step explanation:

in this question it is clearly mentioned that 45 children's tickets have been sold and this number is 60% of the total tickets sold.

now let's assume the total number of tickets sold be x.

then 60% of x = 45

⇒

⇒ x(.6) = 45

by dividing with .6 on both the sides of the equation

⇒ x = 75

therefore 75 tickets have been sold so far.