Answer:
11.9
Step-by-step explanation:
390=290e^(.025x)
x=11.85 which rounds to 11.9
Answer:

Step-by-step explanation:
Let:

We need to eliminate one of the variables, so let's use elimination method. First multiply (1) by 2

Now subtract (2) from 2*(1) in order to eliminate x:

Solving for y:
Multiplying both sides by -1

Finally, replacing the value of y in (1)

Solving for x:
add 41 to both sides:

Multiply both sides by 1/2:

Angles 1 and 3 are supplementary
Answer:
-9
Step-by-step explanation:
-9+6=-3
The answer to the question is 12