Answer:I would say 2

Step-by-step explanation:

Square root of 81 is 9 so the numbers are 8 and 9

**Answer:**

**Step-by-step explanation:**

a = adult cost

c = child cost

a = c + $3

200a + 100c =$2100

^ each # of tickets sold

200(c+3) + 100c =$2100

200c + 600 + 100 c = 2100 combine like terms

300c + 600 = 2100 need variable only on one side of equal sign so you subtract 600 from each side of the = sign

300c = 1500 now divide by 300 on both sides to isolate variable

c = $5

The answer is 492.126 :) Hope it helps!

Let O be the intersection of the vertical line through ZX, and the horizontal line through YW.

The coordinates of this point are clearly (5, 2) as it is at the same x-coordinate as X and Z, and y-coordinate as Y and W.

So, YZO is a right triangle. By the Pythagorean theorem:

.

Since all sides of a rhombus are equal, then the perimeter is :

units.

Answer: third choice.