Iwill mark brainliest if you answered

question 1
a bag contains 4 pink marbles, 7 red marbles, 3 white marbles, and 1 black marble. what is the probability of drawing a red marble out of the bag?
a. 1/14
b. 1/30
c. 7/15
d. 14/16

question 2
a bag contains 6 green marbles, 9 red marbles, 7 white marbles, and 3 black marbles. what is the probability of drawing a red marble out of the bag?
a. 9/16
b. 1/4
c. 1/18
d. 9/25

question 3 use the photo that i uploaded to answer
a. 4/6
b. 1/4
c. 1/3
d. 1/6
question 4
a box contains 12 green balls, 11 red balls, 7 white balls, and 10 black balls. what is the probability of drawing a black ball from this box?
a. 1/10
b. 1/3
c. 1/40
d. 1/4
question 5
a box contains 9 green balls, 16 red balls, 9 white balls, and 6 black balls. what is the probability of drawing a red ball out of the box?
a. 2/5
b. 7/8
c. 1/16
d. 1/4

the answer for 1 is Option A

the answer for 2 is Option  D

the answer for 3 is Option  C

the answer for 4 is Option D

the answer for 5 is Option  A

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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

hello from mrbilldoesmath!

answer:

25x^2 + 90x + 84

discussion:

mn(x) = m(n(x)) = m( 5x + 9) =

(5x + 9)^2 + 3 =>

25x^2 + 90x + 9^2 + 3 =

25x^2 + 90x + 84                 (as 9^2 = 9*9 = 81)

which is the second choice

regards,  

mrb

p.s.   i'll be on vacation from friday, dec 22 to jan 2, 2019. have a great new year!