Sure, what are the questions?
-200 and I got it by multiplying the numbers (10x-2.5) = -25 then multiply 8x(-2.5) and you get -200
The derivative of an exponential function is

Moreover, in this case we must apply the chain rule because the exponent is -x:

Your answer is C because the A will be on the top and H will be on the bottom
Answer:
x = 3
y = 8
Step-by-step explanation:
ok we will substitute
y = x + 5
into the second equation
4x + y = 20
4x + (x + 5) = 20
5x + 5 = 20
5x = 15
x = 3
y = x + 5 = 3 + 5 = 8