If one is 5"x3", and the other having the same orientation is 3"x?, then
by similar figures,
5/3=3/x
cross multiply,
5x=3*3
x=9/5=1.8"
With the original figure, it is possible to validate the above answer.
Coefficient = 7 and 1
7 is the coefficient of a
1 is the coefficient of b
I think it's the communitive property
23. because there is a 90 degree angle and then the 67 degree angle, and triangle law says that all angles add up to 180.
Not sure on the equation but you could try drawing a probability tree
