The answer is 11 im pretty sure<span />
We know: The total number of tickets is 35. Another way of saying this is the number of adults plus the number of children equals 35. i.e.:

Using the symbols provided we can write this is as:

We also know: The total money collected is $75. We know that $6 was collected for every adult or

and $1 for every child or

. i.e.:

Using the symbols provided and adding it all up we can write this is as:

Equation 1:

Equation 2:
Answer:
A5 is approximately 5.8 by 8.3 inches in size, and it's the closest in size to the U.S. paper size called the “half-letter” size, at 5.5 by 8.5 inches. But here's how all the A-series sizes break down: A0 paper is 841 by 1189 millimeters, approximately 33.1 by 46.8 inches.A5 measures 148 × 210 millimeters or 5.83 × 8.27 inches. In PostScript, its dimensions are rounded off to 420 × 595 points.A5148 x 210mm5.8 x 8.3 inch