Before leaving for work, serap checks the weather report in order to decide whether to carry an umbrella. on any given day, with probability 0.2 the forecast is “rain" and with probability 0.8 the forecast is “no rain". if the forecast is “rain", the probability of actually having rain on that day is 0.8 . on the other hand, if the forecast is “no rain", the probability of actually raining is 0.1 . one day, serap missed the forecast and it rained. what is the probability that the forecast was “rain"?

answer:   14

step-by-step explanation:          

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40 minutes

step-by-step explanation:

add the time and multiply by 2

let's cover over the formula of the vertex:

y = a(x – h)^2 + k

in this formula, (h,k) are the vertex, always remember that the positive or negative value of the vertex is based on the sign it has.

for example, if the vertex is -3,-6 then both the x and y value would have the positive sign attached to it and if it were a positive x and y value, then a negative sign would be attached to it.

with that being said, for our problem the x value is a positive one so we are looking for a number with a negative sign next to it, in this case the first and second choice.

however, for the first answer choice it isn't quite part of the formula so we know that the answer choice correctly displays the x value.

to confirm, we can see if the -1 fits correctly with the second answer choice, and as mentioned above a negative number will have a positive sign attached to it. so, for our problem we can see that -1 has been changed to +1, so we can confirm that the second answer choice is correct.

hence, our final answer is y=(x - 1)^2 + 1