X is going to be equal to 15
Answer:

Step-by-step explanation:
Let
x-----> the total students in the marching band
Applying proportion

Answer:
C) 1 / 462
Step-by-step explanation:
22 x 21 = 462
Answer:
5) D. Trapezoid.
6) C. Trapezoid.
7) B. All parallelograms are quadrilaterals.
8) A. A Polygon is a closed figure with. 3 or more curved or straight sides.
<em>Can I please have brainliest?</em>
<em />
The sum of y+x, or 5+7, is rational. This is because each integer(non fraction/decimal)is rational, it is also rational.