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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Bruce traveled 15 kilometers in 60 minutes.Which ratio accurately shows how many minutes it took Bruce to travel one kilometer?

Answers

it would be D. You find this out by dividing 60 by 15 to get how many minutes it takes him to travel one kilometer. So, now you know that it takes him 4 mins to travel one kilometer. ( 4 : 1 ) Hope this helps! :D Let me know if it is right!

Use the figure to find each ratio in simplest form.PO/PS=

2/5
3/5
3/8

Answers

Answer:

3/5

Step-by-step explanation:

PO/OS=6/10=(3*2)/(5*2)=3/5

Answer:

The answer is 3/5

Train A arrives at central station on the hour and every 12 minutes. Train B arrives on the hour and every 15 minutes. When do both trains arrive at the same time? A) On the hour and 30 minutes past the hour
B) On the hour and 15 minutes to the hour
C) On the hour and 27 minutes past the hour
D) On the hour

Please explain why you chose the answer and how you achieved it.

Answers

Train A arrives at central station on the hour and every 12 minutes. Train B arrives on the hour and every 15 minutes. When do both trains arrive at thesame time?

I believe that both trains would arrive at the same time on the hour (D).

Hope this helped :)

The answer is D!!!!!

Can there be more than one point of intersection between the graphs of two linear equations?

Answers

Yes if they are in top of each other... Otherwise no

Answer:

Unless the two equations are exactly the same, there can only be one point of intersection.

Mattias bought a package of 5 notebook for $ 13.95. what is the unit price per notebook

Answers

price per notebook=price/notebook
notebooks=5
price=13.95
prece per notebook=13.95 per 5=13.95/5=2.79
answer is $2.79 per notebook

Solve:-

$13.95 for 5 notebooks
$? per note book

Divide:-
13.95 ÷ 5 = 2.79
$2.79 per book

Check:-

2.79 × 5 = 13.95
Correct!

unit price;- $2.79 per notebook

I need help with this!!! Which has a greater area, a triangle with a base of 100 feet and a height of 100 feet or a circle with diameter of 100 feet, please justify your selection.

Answers

I believe it is a Triangle with a base of 100 ft. and a height of 100 ft.
Yet that's what I learned in class, my teacher isn't paying attention to much of our lessons, so forgive me if this is wrong.

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