Step-by-step explanation:
can't really use the Pythagorean because you don't know this is a right triangle.
use the fact that they are similar
so
3/6 = x/12 where x is FE
cross multiply
6x = 36 therefore FE = 6
then 6/12 = y/9 where y is FD
12y = 54 = 54/12 therefore FD = 4.5
Answer:
8 years old.
(3x+9)
(3(8)+9)=33
$13.50 typical tip
So to find the percentage
multiply 0.15*90
You’ll get 13.5
12
4 times 3 is 12.
4+4+4=12
