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Sati [7]
3 years ago
15

Alyssa has four marbles: a red one, a blue one, a green one, and a yellow one. In how many different ways can she form a set con

sisting of some of the marbles if she must choose at least one marble? (In a set of chosen marbles, it does not matter in what order she chose the marbles.)
Mathematics
1 answer:
OverLord2011 [107]3 years ago
3 0

Answer:

12 possibilities

Step-by-step explanation:

The first choice can be any of the four colors. For each of these 4 first choices there are 3 second choices. Therefore there are 4 x 3 = 12 possibilities.

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How do you do this (the first one)? i've been sitting trying to do this for literally half an hour.
joja [24]
Spain = 140
Italy = 40
France = 60
U.S.A = 120
total = 18,000,000

Spain : 140/360 = 39%.....0.39(18,000,000) = 7,020,000
Italy : 40/360 = 11%....0.11(18,000,000) = 1,980,000
France : 60/360 = 17%....0.17(18,000,000) = 3,060,000
U.S.A : 120/360 = 33%...0.33(18,000,000) = 5,940,000



6 0
3 years ago
Find x step by step ​
11111nata11111 [884]

Answer:

\frac{4 + (x + 1)}{x + 1}  =  \frac{16}{12}  \\  \\  \frac{5 + x}{x + 1}  =  \frac{16}{12}  \\  \\ 12(5 + x) = 16(x + 1) \\ 60 + 12x = 16x + 16 \\ 4x = 44 \\ x = 11

4 0
3 years ago
Read 2 more answers
Each container holds 1L 275ml of water. How much water is in 609 identical containers? Find the difference between your estimate
yan [13]
Do the conversion of 1l to ml and add 275 plus that number then multiply
7 0
3 years ago
Which equation represents the relationship between the angles in this figure?
mrs_skeptik [129]

Answer:

Step-by-step explanation:

sum of angles on a straight line = 180

b + b + 148 = 180

2b + 148 = 180

3 0
3 years ago
Read 2 more answers
9. The diameter of the Earth is 7899.83 miles from the North Pole to the South Pole and 7926.41 miles from opposite points at th
myrzilka [38]

Answer:

We could think of the Earth as a sphere, where the diameter of this sphere will the mean diameter between the measure from the North pole to the Soth pole and the measure from opposite points of the equator.

Remember that the mean between two numbers A and B is:

Mean = (A + B)/2

In this case, the mean diameter will be:

D = (7,899.83mi + 7,926.41mi)/2 = 7,913.115 mi

And we know that the surface of a sphere of diameter D is:

S = 4*pi*(D/2)^2

Where pi = 3.14

Then the surface of the Earth will be something like:

S = 4*3.14*(7,913.115mi/2)^2 = 196,618,601.47 mi^2

b) We know that 75% of the Earth's surface is water, now we will use the diameter 7,926.41 mi to compute the surface.

First, the total surface of the Earth will be:

S = 4*3.14*(7,926.41mi/2)^2 = 197,279,843.03 mi^2

And 75% of this is water, then the total water surface is 0.75 times that area, this is:

water surface = 0.75*197,279,843.03 mi^2 = 147,959,882.27 mi^2

6 0
3 years ago
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