Aplica la formula general en las siguientes ejercicios

a)4x^2 = 9x - 2
b) 5x^2 - 9x= -4
c)2x^2 + x = 55
d)3x^2 - 8x= 3
e) 7x^2 - 3x = 4
f)4x^2 - 10x= 6
g)5x^2 = 3x + 14
h) 8x^2 = x + 7
i)3x^2 = 10x +25
j) x^2 + 9x - 10

What is the value of x when x + 7 = 21?

Plzzz answer both questions and i will give you 100 points

Afriend of mine is giving a dinner party. his current wine supply includes 10 bottles of zinfandel, 8 of merlot, and 11 of cabernet (he only drinks red wine), all from different wineries. (a) if he wants to serve 3 bottles of zinfandel and serving order is important, how many ways are there to do this? ways (b) if 6 bottles of wine are to be randomly selected from the 29 for serving, how many ways are there to do this? ways (c) if 6 bottles are randomly selected, how many ways are there to obtain two bottles of each variety? ways (d) if 6 bottles are randomly selected, what is the probability that this results in two bottles of each variety being chosen? (round your answer to three decimal places.) (e) if 6 bottles are randomly selected, what is the probability that all of them are the same variety? (round your answer to three decimal places.)