A bag contains only red and blue marbles. Yasmine takes one marble at random from the bag. The probability that she takes a red marble is 1 in 5. Yasmine returns the marble to the bag and adds five more red marbles to the bag. The probability that she takes one red marble at random is now 1 in 3. How many red marbles were originally in the bag?

Answers

Answer 1
Answer: There was one red marble because it said that the probability of choosing a red marble is 1/5 so the other marbles are blue. 
Hope this helps. 

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Conrad has a collection of three types of coins: nickels,dimes,and quarters.There are five more nickels than quarters but four times as many dimes as quarters.If the entire collection is worth $5.85,how many nickels,dimes,and quarters are there?

Answers

n=number of nickles
d=number of dimes
q=number of quarters
use cents for everything

total value=585
5n+10d+25q=585
divide everybody by 5 to simplify
n+2d+5q=117

we have

nicles are 5 more than quarters
n=5+q

4 times as many dimes as quarters
d=4 times q
d=4q

sub those in
5+q+2(4q)+5q=117
5+6q+8q=117
5+14q=117
minus 5
14q=112
q=8

sub back
n=5+q
n=5+8
n=13

d=4q
d=4(8)
d=32


13 nickles
32 dimes
8 quarters
divide both sides by 22

In the diagram below, Figure B is a dilation of Figure A.Which of the following is true?
A.
Figure B is a reduction of Figure A.
B.
The two figures are similar.
C.
Figure A is a translation of Figure B.
D.
The two figures are congruent.

Answers

B.The two figures are similar

How do I solve this

Answers

Look at the picture.

Part ATheresa and her brother, Ruben, are getting phones that each have 32 gigabytes of storage. How many bits of storage come with each phone? Type your answer in both scientific and standard notation.
Round the values so the first factor goes to the hundredths place when you are working with numbers in scientific notation.

Answers

Answer:

32/100

Step-by-step explanation:

0.4x+0.5y=2.51.2x-3.5y=2.5




ELIMINATION BY USING MULTIPLICATION

Answers

\begin{cases} 0.4x+0.5y=2.5\ \ /*7 \n 1.2x-3.5y=2.5\end{cases} \n \n \begin{cases} 2.8x+3.5y=17.5 \n 1.2x-3.5y=2.5\end{cases}\n +\ \ -------- \n4x=20 \ \ /:4\n \nx=5

0.4x+0.5y=2.5\n \n 0.4*5+0.5y=2.5\n \n2+0.5y=2.5\ \ | -2\n \n0.5y=2.5-2\n \n0.5y=0.5 \ \ :/ \ 0.5\n \n y=1 \n \n \begin{cases}\ \x=5 \n y=1 \end{cases}


Find the equivalent expression. 12a +6b A.2(10b + 4b) B.6(6a + b) C.2(6a + 4b) D.6(2a + b)

Answers

12a + 6b = 6(2a+b) so D
The answer to your question is D, I hope this helped!!!!! Enjoy the rest of you day!!!!!