Answer:
$145.64
Bc 250 USD = (1.03069 Euro /1 USD) = 257.6725
257.6725-150=107.6725
107.6725 Euro = (1.35261 USD/ 1 Euro) = 145.64
I think ;')
The answer is 12.64. I hope I helped. :)
Part B: It would be 8x+24. You get 4x+12 and double(times 2) it, it would be 8x+24.
Part C: Yes, because the relationship between the ratio would always be proportional.
A very simple example is:

What you need to is just distribute x into the parenthesis, so once x times the first term (a) and once x times the second term (b)
I hope you got
the idea
Answer:
(x - 6)(x + 5)
Step-by-step explanation:
You know that in order to get x^2 there has to be two x's so you get:
(x ...)(x...)
Then you also know that two numbers have to multiply together and equal 30 but also have a sume of -1. So you get:
(x - 6)(x + 5)