Answer:
, 
Step-by-step explanation:
<h3>
I will use the elimination method.</h3>
We want to make the X's the same:


Because the signs of the X's are the same we subtract the 2 equations to make:
(I put the second one on top of the 1st)

So:

Substitute y into either equation 1 or 2:
(I chose equation 1)



So:

Answer:
390
Step-by-step explanation:
500*.22=110
500-110=390
390
Answer:
Step-by-step explanation:
Alright, lets get started.
using Sine Law,




Another angle will be

considering angle B, angle C = 
considering angle B', angle C' = 



Similarly, finding c'



Hence two triangles are possible with below details: : Answer
A = 30, B = 48.6, C = 101.4, c = 7.84
A = 30, B' = 131.4, C' = 18.6, c' = 2.55
Hope it will help :)
Answer:
pi × 18cm^2
Or approximately,
56.52cm^2 (using 3.14 for pi)
or
56.5487cm^2 (using pi button on calculator)
Step-by-step explanation:
Area of a circle is pi times [radius squared].
All circles are 360°.
Problem can be solved by finding area of whole circle, and then using ratios.
Whole Circle: area = pi × (9cm)^2 = pi × 81cm^2
80° / 360° = Area[shaded] / (pi × 81cm^2)
pi × 18cm^2 = Area[shaded]
((If you read my answer before the edit, I am sorry. I made a calculator error.))
Hey. Why are you so worried. Here is the answer. There is a very small problem.It is that the decimal point is not added.