For triangle a use Pythagorean theorem to find the hypotenuse.
A^2+b^2=c^2
15^2+9^2=c^2
225+81=306
C^2=306
C=17.49 or square root of 306
For b) 18^2+B^2=23^2
324+B^2=529
B^2=205
B=14.32 or square root of 205
Answer:
43.24% probability that the student will be a boy
Step-by-step explanation:
A probability is the number of desired outcomes divided by the number of total outcomes.
Desired outcomes:
Student being a boy.
8 boys from Wilmette
5 boys from Glencoe
3 boys from Winnetka
So 
Total outcomes:
All students

Probability:

43.24% probability that the student will be a boy
Answer:
Step-by-step explanation:
First, bring the one down.
Then, -3*1=-3, so it goes underneath the -13.
Add, -13+(-3)=-16
So, -3*-16=48
Finally, -48+48=0
x-16, (A).
Answer:
x^2-2x+1
this factors out to (x-1)(x-)
both of those are equal to x=1