A bag contains 2 white marbles and 7 purple marbles. Two marbles are drawn at random. One marble is drawn and not replaced, then a second marble is drawnA. What is the probability of selecting a purple marble and then a white marble?
B. What is the probability of selecting 2 white marbles?
C. Is there a greater chance of selecting 2 white marbles in a row or 2 purple marbles in a row? Show your work!

Hallie is trying to win the grand prize on a game show. Should she try her luck by spinning a wheel with 6 equal sections labeled from 1 to 6 and hope she gets a 5, or should she roll two number cubes and hope she gets the same number on both cubes. Show your work?

Answers

Answer 1

Answer:

A. likely

B. unlikely

C. There is a greater chance in picking to purple marbles because there are less of the white and more purple.

Hallie should spin the wheel because u have a greater chance of landing on a 5 then rolling two number cubes and hoping both number cubes come to equal 5.

Answer 2

Answer: two white marbles: probability first is white is \frac{2}{9} probability second is white given that the first is white is \frac{1}{8} again probability both happen is \frac{2}{9}\times \frac{1}{8}

Hope this helps.

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20% of 150 is what number?

48.8 into a percent

Answers

Answer:

4880%

Step-by-step explanation:

u times 48 by 100 and then 0.8 is 80% so 4880%

Which dice is not a regular polyhedron.
why?

Answers

Chinese dice are polyhedron, but a normal dice is a square. "A polyhedron is a solid in three dimensions with flat polygonal faces, straight edges and sharp corners or vertices."

X^2 + 20x + 28 = 9 find the graphing/vertex form

Answers

Answer: $(x+10)^2+119=0$

Step-by-step explanation:

For a quadratic equation, the vertex form is given by : $y=a(x-h)^2+k$ , where (h, k) is the vertex.

The given quadratic equation: $x^2 + 20x + 28 = 9$

Subtract 9 from both sides

$=x^2+20x+19=0$

compare this to $x^2+bx=c$ , and add $((b)/(2))^2$ both sides

b= 20

$x^2+20+100+19=-100$ [(b/2)²=20/2=10]

$\Rightarrow\ x^2+2(x)(10)+10^2+119=0$

$\Rightarrow\ (x+10)^2+119=0\ \ \ [\because\ (a+b)^2=a^2+b^2+2ab]$

So, the vertex form : $(x+10)^2+119=0$

What is .185 as a fraction

Answers

0,185 = 185/1000 = 37/200

Answer:

37 over 200 or 37/200

Step-by-step explanation:

185 over 1000

then simplify

David and Sue are playing a card game. David’s score is –12. David’s and Sue’s scores differ by 7 points. Which expressions could represent Sue’s score?

Choose two answers that are correct.

A.
7 + 12

B.
–12 + 7

C.
–7 + 12

D.
–12 – 7

Answers

The answers are B. and D.
The scores are 7 apart, but that could be either 7 less or 7 more.

6) You have a bag of candy. You eat half of the candy after lunch and a quarterof what you have left after dinner. Now you have 3 pieces left. How many
candies did you start with?

Answers

Answer:

you started with 6 candies

Step-by-step explanation:

find the sum if 1/2 and 1/4 of the remaining half

1/2+1/4=3/4

therefore 3/4 of the candies has been eaten remaining 1/4 of the candies.

total fractions of candies =1

if 1/4 : 3

then 1: ?

if more, less divides

1÷1/4×3

1×4/1×3

there fore the total candies are 12 and since the question asked his much you started with, and you know you started with half of the total, find half of the total

1/2×12=6

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