Answer:
42
Step-by-step explanation:
6*(-3) = (-18)
24-(-18) = 42
You need to give more info so like show more of the question
Your answer would be A because the radius of the circle is half of its diameter.
Hope this helps <3 :)
Answer:
and 
Step-by-step explanation:
Given:
Equation 1:

Simplifying the above equation by dividing both sides by 100


Equation 2:

Simplifying the above equation by dividing both sides by 400.


Now the system of equation is:
(1a) 
(2a) 
Solving by elimination
Multiplying equation (2a) with 

(2b) 
Adding equations (1a) and (2b) in order to eliminate 

+ 
We get 
∴ 
Plugging
in equation (2a).

Adding
both sides.

∴ 