Juan ha leído ya la quinta parte de un
libro. cuando lea 90 páginas más, todavía
le quedará la mitad del libro. ¿cuántas
páginas tiene el libro? ¿cuántas páginas
lleva leídas?

I don't speak Spanish. It would be helpful if you could translate to English :)

Step-by-step explanation:

Question translated:

Juan has already read the fifth part of a

book. When I read 90 more pages, still

He will have half the book left. How many

pages does the book have? How many pages

have you read?

This doesn't make sense:)

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

answer: on kudzu, being female and being green are independent events.

step-by-step explanation: