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marissa [1.9K]
3 years ago
11

cybil flips a coin and rolls a fair number cube at the same time. What is the probability that she will toss tails and roll a nu

mber less than 3?
Mathematics
1 answer:
IRISSAK [1]3 years ago
8 0

Answer:

\frac{1}{6}

Step-by-step explanation:

Flipping a coin and rolling a number cube are both independent events. Independent events do not rely on the outcome of any previous events.  This means that whatever you flip on the coin will have no effect on whatever you roll on the number cube and each flip of the coin or roll of the cube has the same probability as the flip or roll before.  

The probability of getting tails on a coin toss is: \frac{1}{2}

The probability of getting a number less than 3 (so 1 or 2) on a number cube is: \frac{1}{3}

Since we are combining these events, we need to multiply the fractions together to get our overall probability:

\frac{1}{2}*\frac{1}{3}=\frac{1}{6}

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Two boxes contained 155 lb of flour. If you take 20 lb from the first and add it to the second, the first box will contain 12 19
gladu [14]

Answer:

First and second box had 80 and 75 lb flour originally.

Step-by-step explanation:

Let the two boxes contained x lb and y lb of the flour respectively.

Both the boxes contained 155 lb of flour in total.

So the first equation will be,

x + y = 155 --------(1)

If the 20 lb of the flour is taken out then amount of flour in first box = (x - 20) lb

and added to the second box then flour in second box = (y + 20) lb

After the mixing of flour statement says that "the first box will contain \frac{12}{19} of the flour now in the second box."

For this statement equation will be

(x-20)=\frac{12}{19}(y+20)

19(x - 20) = 12(y + 20)

19x - 12y = 380 + 240

19x - 12y = 620 ------(2)

Equation (1) × 12 + equation (2)

12(x + y) + (19x - 12y) = 155×12 + 620

31x = 1860 + 620

31x = 2480

x = \frac{2480}{31}

x = 80 lb

from equation (1)

80 + y = 155

y = 155 - 80

y = 75 lb.

Therefore, first and second boxes had 80 lb and 75 lb of flour originally.

3 0
3 years ago
Solve for the factual of (5!)
Lelu [443]
1×5 or 5×1 would be a factual of it
4 0
3 years ago
Dallas was told to run around the perimeter of the high
Zina [86]

Answer:

Option (4)

Step-by-step explanation:

Perimeter of a polygon is the sum of measures of all sides of the polygon.

From the picture attached,

Distance run by Dallas = Perimeter of the ground

                                      = 48 + 50 + 9 + 30 + 30 + 30 + 9 + 50

                                      = 256 yards

Total warm up run by Dallas = 256 yards

Therefore, Option (4) will be the correct option.  

7 0
3 years ago
Read 2 more answers
What is 4^2y-3^2=-5y+(-5+7)<br> Please explain step by step i need this asap :/
dybincka [34]

y = 11/21

To solve this first evaluate the power (then calculate the sum):

<u><em>4^{2}</em></u>y - <u><em>3^{2}</em></u> = 5y +<u><em> (-5 + 7)</em></u>

16y - 9 = -5y + 2


Next Move terms (move variable to the left side and change its sign) (Move constant to the right side and change its sign):

16y <u><em>- 9 </em></u>= <u><em>-5y</em></u> + 2

16y + 5y = 2 + 9


Next Collect the like terms and calculate the sum:

<u><em>16y + 5y</em></u> = <u><em>2 + 9</em></u>

21y = 11


Lastly divide both sides of the equation by 21:

<u><em>21y = 11</em></u>

y = \frac{11}{21}


4 0
3 years ago
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What is the side length of a cube that has a volume of 729 in.³
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V = a^3
729 = a^3 
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answer. side length = 9 in
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3 years ago
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