The ratio is 4:5 girls to boys
Answer:
x = 10
Step-by-step explanation:
Use Pythagorean theorem to find the value of x
Focus only on one half of the triangle
if we slice the triangle in half, we get a right angle triangle
the base will now be 12/2 = 6
Pythagorean theorem says that 
plug 6 as a and 8 as b.
this should give you 100
now take the square root to find c (which equals x)
Ta-da!
You want the average?
add them all together and then divided by the number of events
Answer: y = 4x + 43
Step-by-step explanation: In the photo
Answer:(9+41)+-1-71)
Step-by-step explanation: