Answered Leven purple marbles, seven orange marbles and two pink marbles are in a bag. What is the probability of selecting a purple marble, not replacing it, and then selecting an orange marble?
Question 4 options:

19%

20%

21%

22%

20% (pls mark me brainliest)

Step-by-step explanation:

1. you have to figure out what percentage each marble is by dividing 100 by the total amount of marbles 100 ÷ 16 = 6.25%

2. you then take that sum and you multiply it times seven because there are seven purple marbles, 6.25 x 7 = 43.75% which is the probability that you'll pick a purple marble.

3. you would then have 15 marbles so you would have to do step 1. again but with 15 substituted instead of 16, 100 ÷ 15 = 6.67%

4. after that you would do step 2. again, this time taking 6.67 and multiplying it by seven because of the seven orange marbles: 6.67 x 7 = 46.69%

5. since for this to work you would need to choose the purple one in the first place you need to figure out what 46.69% is out of 43.75%: 20.426875% which rounds down to 20%

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!