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2 years ago

An environmentalist wants to find out the fraction of oil tankers that have spills each month.

Mathematics

1 answer:

Anastasy [175]2 years ago

3 0

Answer:

The estimate of the proportion of oil tankers that had spills is 0.25.

Step-by-step explanation:

Proportion of oil tankers that had spills:

1036 tankers.

777 did not have spills.

So 1036 - 777 = 259 had spills.

The proportion is:

$p = \frac{259}{1036} = 0.25$

The estimate of the proportion of oil tankers that had spills is 0.25.

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Korolek [52]

Answer: B. 4

Step-by-step explanation:

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3 years ago

The difference of two trinomials is x2 − 10x + 2. If one of the trinomials is 3x2 − 11x − 4, then which expression could be the

12345 [234]

Answer:

$4x^2-21x-2$

Step-by-step explanation:

Given that:

Difference of two trinomials is $x^2 - 10x + 2$

One of the two trinomials is $3x^2 - 11x - 4$

To find:

The other trinomial = ?

Four options are:

$2x2 - x - 2 \\2x2 + x + 6 \\4x2 + 21x + 6\\ 4x2 - 21x - 2$

Solution:

Let the two trinomials be A and B.

Given A - B = $x^2 - 10x + 2$

B = $3x^2 - 11x - 4$

We have to find the other trinomial A.

A - B = $x^2 - 10x + 2$

A - ( $3x^2 - 11x - 4$ ) = $x^2 - 10x + 2$

$\Rightarrow$ A = $x^2 - 10x + 2$ + ( $3x^2 - 11x - 4$ )

$\Rightarrow$ A = $4x^2-21x-2$

So, the correct answer is $4x^2-21x-2$ .

3 0

2 years ago

Factor 140c + 28 - 14a to identify the equivalent expressions.

Feliz [49]

Answer:

The answer to your question are letters A, C and D.

Step-by-step explanation:

To factor this polynomial we need to look for the common factor of the three terms.

To find it, get the greatest common factor

140 28 14 2

70 14 7 2

35 7 7 5

7 7 7 7

1 1 1

Greatest common factor = 2 x 7 = 14

Factor the polynomial

140c + 28 - 14a = 14 ( 10c + 2 - a)

Factor only 7 7(20c + 4 - 2a)

Factor only 2 2 (70c + 14 - 7a)

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2 years ago

One out of 23 high school ball players plays college ball. One out of 35 college players plays professional ball. What fraction

Gnoma [55]

Answer:

$\frac{35}{23}$ is the required fraction.

Step-by-step explanation:

We have been given that 23 high school ball players plays college ball.

And 35 college players plays professional ball

So we need to find fraction of high school players professional ball

$\frac{35}{23}$ is the required fraction.

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2 years ago

after two tests carol has a total score of 170. the score on her first test was 8 points higher than the score on her second tes

RoseWind [281]

X stands for the score of her first test
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2 years ago