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skelet666 [1.2K]
2 years ago
14

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?
try your luck 98 point i think this worth
Mathematics
1 answer:
Minchanka [31]2 years ago
7 0

Answer:

Step-by-step explanation:

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Find the measure of a.
Nostrana [21]

Answer:

50 degrees

Step-by-step explanation:

We know that an inscribed angle in a circle is 1/2 the arc that it inscribes. So, therefore the arc is inscribed by the 25 degrees is 50. Assuming that the center of the circle is O, the center angle will be the arc measure. Knowing this, angle a is 50 degrees. If you're curious about all these theorems, they can be proved using similar triangles.

fyi, using the same logic, angle b is 25 degrees

8 0
2 years ago
if the area of a square is 144 feet and the perimeter of the triangle is 28 feet, what is the perimeter of the room's floor?
FinnZ [79.3K]

Answer:

52+12\pi

Step-by-step explanation:

The diagram for the question is attached below

perimeter of the triangle is 28 feet

area of a square is 144 feet

Area of the square is side^2

side ^2= 144

take square root on both sides

side = 12

side of the square = 12

side is the diameter of the semicircle

Diameter = 12 , so radius = 12 divide 2 = 6

circumference of semicircle = 2\pi r=2\pi (6)=12\pi

one side of the rectangle is calculated in the perimeter of triangle and other side is calculated using circumference

perimeter of other two side = 2(12)= 24

Total perimeter = 28+24+12\pi =52+12\pi

4 0
3 years ago
Find the value of x for which 2x ^(1/ 2) = 32.
Mrac [35]

Answer:

The value of x will be 8    

Step-by-step explanation:

We have given that 2\sqrt{x}=32

We have to find the value of x

As 2\sqrt{x}=32

For finding the value of x we have to square both side

On squaring both side

We done squaring both side for easy simplification

4x=32

So x = 8

So the value of x will be 8

So answer will be 8

5 0
3 years ago
There are four $20 bills, five $10 bills, seven $5 bills, and four $1 bills in your wallet. You select one bill at random. What
coldgirl [10]
The expected value is to get either a $5 bill or a $10 bill because of it has more of it's kind in the wallet.
5 0
3 years ago
Two equations are listed below. Solve each equation and compare the solutions. Choose the statement that is true about both solu
enyata [817]
<span>|5x − 6| = −41  it has no solutions because module ( abs value) cannot be negative

|7x + 13| = 27          -(7x+13)=27
7x+13=27                 -7x-13=27
7x=14                       -7x=40
x=2                            x=-40/7

check:   </span>|7*(-40/7) + 13| = 27  ,   |-40 + 13| = 27,   |-27| = 27 correct<span>
                               
There are no statements, so I cannot choose the correct one</span>
8 0
2 years ago
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