Answer:
if you need help with problems like that I suggest algebra calculator or math away
1) Striangle = 1/2 * (12-8) * 4 = 1/2 * 4 * 4 = 8 km^2
2) Srectangle = 4 * 8 = 32 km^2
3) Sfigure = 8 + 32 = 40 km^2
Number C
Answer:
(4,4)
Step-by-step explanation:
hope this help
Answer:

Step-by-step explanation:
Given the exponential decay function 
When
then

so the initial amount is 
The exponential decay function
has the decay factor 
In your case, the eexponential decay factor is 
Answer:
-8
Step-by-step explanation:
first combine like terms 5x+5x=10x
then subtract 5 from -75= -80
divide -80 by 10= -8
you are left with -8=x