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Olin [163]
3 years ago
6

Jan completes 60 trials of pulling colored marbles out of a bag. She pulled green 15 times. If there are 250 marbles in the bag,

how many of them are probably green?
Mathematics
2 answers:
Vilka [71]3 years ago
8 0

Answer:

the answer is 63 green marbles

Step-by-step explanation:

matrenka [14]3 years ago
8 0

Answer:

Green marbles are probably = 62.5.

Step-by-step explanation:

Since Jan completes 60 trials and pulled green 15 times, the probability of any marble being green can be calculated as:

= 15/60

= 0.25

With 250 marbles in the bag, using the probability value of green marbles calculated above, the number of green marbles can be estimated as:

= 0.25 of 250

= 62.5

This shows that since there is a 25% probability of obtaining a green marble from 60 trials of pulling colored marbles out of the bag containing 250 marbles, then the total number of green marbles will be equal to 62 or 63.

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The length of a rectangle is four times the width. The perimeter of the rectangle is 45 inches. Write a system of equations that
wolverine [178]

Answer:

Let l be the length and w the width of the rectangle.

P as the perimeter and A as the area.

length of a rectangle is four times the width:

w = w

l = 4w

System of equation : 2l + 2w = P

Substitute:

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8w + 2w

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w = 45 / 10

w = 4.5

Solve for l:

l = 4w

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Area:

A = lw

A = 18(4.5)

A = 81 in²

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3 years ago
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Answer:

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4/16 can be divided by 4 to get 1/4

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Step-by-step explanation:

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2 years ago
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3 years ago
Two similar pyramids have base areas of 12.2 cm2 and 16 cm2. The surface area of the larger pyramid is 56 cm2. What is the surfa
docker41 [41]

Given =

Two similar pyramid have base area of 12.2 cm² and 16 cm².

surface area of the larger pyramid = 56 cm²

find out the surface area of the smaller pyramid

To proof =

Let us assume that the surface  area of the smaller pyramid be x.

as surface area of the larger pyramid is 56 cm²

Two similar pyramid have base area of 12.2 cm² and 16 cm².

by using ratio and proportion

we have

ratio of the base area of the pyramids : ratio of the surface area  of the pyramids

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x = 12.2 ×56×\frac{1}{16}

by solvingthe above terms

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x =42.7cm²

Hence the surface area of the smaller pyramid be 42.7cm²

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