Answer:
6.93 cm
Step-by-step explanation:
You have a right triangle (90°), so you do as follow:
If I understand correctly, you are looking for the hypotenuse so

That is equal to 
(4*3)+-4=8, this is just how to put it in the equation
Answer:
25
Step-by-step explanation:
the question basically translates to
160% x n =40
a little trick with percents I use is that the word "of" always means multiplication.
n=40/160%=25
N=25 because 20 divided by 4 is 5 which is 1/5 of n meaning 5x5 is 25