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3 years ago

11

A bag contains 12 red, 30 blue, 20 green, 10 yellow, and 8 black marbles. Nancy chooses 1 marble from the bag. What is the proba

bility that the marble is red, blue, or black?
A.18
B.38
C.58
D.78

1 answer:

marshall27 [118]3 years ago

6 0

Step-by-step explanation:

Total marbles = 12 + 30 + 20 + 10 + 8 = 80

Probability = 12 + 30 + 8 = 50

= 50 / 80 = 5 / 8

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the greatest volcanic eruption in recorded history took place in 1815 on the indonesian island of sumbawa, when the volcano tamb

algol [13]

Answer:

$166\frac{2}{3}\ m$

Step-by-step explanation:

Let

x ----> the average depth of the resulting layers of ash and rock

we know that

To find out the average depth, divide the cubic kilometers of molten rock by the area where all the ejected material fell.

so

$\frac{100\ km^3}{600\ km^2}=\frac{1}{6}\ km$

Convert to meters

Remember that

$1\ km=1,000\ m$

so

$\frac{1}{6}\ km=\frac{1}{6}(1,000)=\frac{1,000}{6}=\frac{500}{3}\ m$

Convert to mixed number

$\frac{500}{3}\ m=\frac{498}{3}+\frac{2}{3}=166\frac{2}{3}\ m$

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3 years ago

There were 20 boys and 26 girls in a chess club last year. This year the number of boys increased by 30% but the number of girls

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Step-by-step explanation:

Boys

$20 + (20 \div 100)30 = \\ = 20 + 0.2 \times 30 = \\ = 20 + 6 = \\26$

Girls

$26 - (26 \div 100)15 = \\ = 26 - 0.26 \times 15 = \\ = 26 - 3.9 = \\ = 22$

Total last year 46

Total this year 48

Increase

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2 years ago

Holly bought a sweater on sale for 20% off the original price. If she saved $40, what was the original price?

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40 is 20% of 160, so if she saved 40$ and it was 20% off then the original price was 160$!!!

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2 years ago

A soccer player passes the ball from a point that is 18 yards from the endline and 12 yards from the sideline. A teammate who is

ExtremeBDS [4]

The answer would be 44.9 yard.

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3 years ago

Noah drew 26 hearts, 21 stars, and 38 circles. what is the ratio of stars to hearts to circles?

mamaluj [8]

Answer:

21:26:38

Step-by-step explanation:

Ratio in mathematics is the relationship between two or more amounts, showing how many times they can be contained in one another.

Example: 1:2 means there are two times the first amount in the second.

For the case above;

Given;

Number of each shape noah drew;

hearts = 26

Stars = 21

circles = 38

The ratio of stars to hearts to circles

N(stars) : N(hearts) : N(circles)

21:26:38

Since they are not divisible by a common factor the ratio remains;

21:26:38

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3 years ago