associative of multiplication
Part. %
------ = -------
Whole 100
816. X
------- = ------
850. 100
850x=81600
-------- ---------
850. 850
X=96
96% of seats were sold
Answer:
91
Step-by-step explanation:
shaded area= area of rec - area of semi circle
A= 12*14- 1/2*22/7*7²= 91 cm²
note π=22/7 not 2/7
Check the picture attached.
Let m(BAE)=m(ACD)=α
(BAE and ACD are congruent, since they are alternate interior angles, or Z angles)
Let m(ABE)=β.
So in triangle ABE, the measures of the angles are 90, α and β degrees.
This means that m(BCE)=β, since the 2 other angles of triangle BCE are 90 and α degrees.
thus, we have the similarity of triangles ABE and BCE,
so the following rations are equal:

so

so



(inches)
Remark, we can also apply Euclid's theorem directly.
Answer: boy 9 years
Girl 3 years
Step-by-step explanation: