Answer:
$3.72
Step-by-step explanation:
7.75*2=15.5
15.5+0.78=16.28
20-16.28=3.72
F(x)=-2e^x
x=3
f(3)=-2e^3
pemdas so exponents first
e^3
e=2.718281828454590
cube that
20.0855
now we have
-2 times 20.0855=-40.1711
answer should be -40.1711
(I see what you did wrong, if -6=-2 times e^3, divide -2, 3=e^3, maybe you just put -2 times 3 by mistake)
You must first attach the problems with your question.
Answered it step by step with this picture, hope this helped you! Basically all triangles add up to 180 degrees so you add the two sides, subtract the combination of the sides by 180 and then divide by 4x to get to the answer. Makes a lot more sense on img