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3 years ago

7

There are 8 blue marbles, 6 red marbles, and 4 white marbles in a jar. if a marble is selected at random from the jar, what is t

he probability that it is not red?

1 answer:

Montano1993 [528]3 years ago

3 0

Answer:

44

Step-by-step explanation:

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what is 1/4 of 24.................................................................................................

Ahat [919]

Answer:

6.

Step-by-step explanation:

$24 * \frac{1}{4} = 6$

5 0

3 years ago

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A bag contains circular chips that are the same size and weight. There are 8 purple, 4 pink, 8 white, and 2 blue chips in the ba

pishuonlain [190]

Answer:

9/11

Step-by-step explanation:

all the chips other than a pink chip add up to 9.

3 0

4 years ago

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At present a man is 5 times as old as his son, in 13 years time he will be three times as old as his son. Find the man's present

Yuliya22 [10]

Answer:

65

Step-by-step explanation:

let the son's age be x then the man's age is 5x

In 13 years

son's age = x + 13 and man's age = 5x + 13 and he is 3 times as old as son

5x + 13 = 3(x + 13)

5x + 13 = 3x + 39 ( subtract 3x from both sides )

2x + 13 = 39 ( subtract 13 from both sides )

2x = 26 ( divide both sides by 2 )

x = 13 ← son's present age

5x = 5 × 13 = 65 ← man's present age

6 0

3 years ago

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What is f(7) for function f(x)=2x - 5

Kobotan [32]

Because in the function f(x) all you do is plug in the value that is given...7

2*7-5=14-5=9

Your answer is 9.

8 0

4 years ago

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In math class, 4 students complete individual surveys to determine the percentage of high school teachers that have a second job

dlinn [17]

Answer:

Option D) B and C

Step-by-step explanation:

we know that

To find out the percentage of high school teachers that have a second job, divide the number of teachers that have a second job by the total number of teachers

<em>Survey A</em>

$\frac{28}{110}=0.2545$

Convert to percentage

$0.2545(100)=25.45\%$

<em>Survey B</em>

$\frac{27}{90}=0.3$

Convert to percentage

$0.3(100)=30\%$

<em>Survey C</em>

$\frac{21}{70}=0.3$

Convert to percentage

$0.3(100)=30\%$

<em>Survey D</em>

$\frac{32}{80}=0.4$

Convert to percentage

$0.4(100)=40\%$

Compare the percentages

Surveys B and C have the same percentage

therefore

Surveys B and C show proportional results, because the ratio of the number of teachers that have a second job by the total number of teachers is equal (this number is the constant of proportionality k in a proportional relationship between two variables)

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3 years ago