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3 years ago

A fair die is rolled repeatedly. find the expected number of rolls until all 6 faces appear.

Mathematics

1 answer:

Makovka662 [10]3 years ago

8 0

Each face has a chance of 1/6
So you beed 6 rolls

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15m+m+2 <br> I need help on combining like terms

Mice21 [21]

Answer:

its 16m+2

Step-by-step explanation:

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then you put the two right next to it

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4 years ago

For your friend's birthday, you have 3 presents to wrap. Find the combined surface area of these 3 gifts so you know how much wr

omeli [17]

The answer is: 5,614 square inches.

The explanation is shown below:

1. The gift on the bottom is a rectangular prism. To calculate its surface area, you must apply the following formula:

$SA=2[(l)(w)+(l)(h)+(h)(w)]$

Where $l$ is the length (20 inches), $w$ is the width (42 inches) and $h$ is the heigth (16 inches).

2. Substitute values:

$SA1=2[(20in)(42in)+(20in)(16in)+(16in)(42in)]=3,664in^{2$

3. The surface area of the other gifts can be calculated with the formula for calculate the surface area of a cube:

$SA=6s^{2}$

Where $s$ is the side.

4. The surface area of the bigger cube is:

$SA2=6(15in^{2})=1,350in^{2}$

5. The surface area of the smaller cube is:

$SA3=6(10in^{2})=600in^{2}$

6. The total surface area (the combined surface area of the three gifts) is:

$SAt=SA1+SA2+SA3\\SAt=3,664in^{2}+1,350in^{2}+600in^{2}\\SAt=5,614in^{2}$

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3 years ago

tickets for a lower level seats sell for $35 each and tickets for an upper level seats sell for $25 each. the theater sells 350

Liono4ka [1.6K]

The work and answer is shown in the image below. Just set the variables and solve.

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3 years ago

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The volume is 8/27 ft³.

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4 years ago

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