<span>In the form of a/b = c/d in proportions in math,
the outer terms are called the extremes and the inner terms are called means.
In the given 3/4 = 15/20, the outer terms or the extremes are 3 and 20.</span>
Answer:
b) 
Step-by-step explanation:
b) To find the inverse function, switch the 
and 
variables and solve for :
Verify Answer:
3/10 = 3 : 10 = 0,3 = 30 %
.................................................
Answer:
a=20°
b=70°
Step-by-step explanation:
b+b+40°=180°[angles in an isosceles triangle]
a+90°+b=180°[angles in a right angled triangle]
