3 years ago

What are the odds against selecting a red marble

Mathematics

1 answer:

kodGreya [7K]3 years ago

6 0

Answer: it’s the first one.

Step-by-step explanation:

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Perform the indicated operation.(4r/r+3) - (5/r)

Aleks [24]

Answer:

4r² - 5r - 15 / r(r+3)

Step-by-step explanation:

To solve this problem, we will proceed the following way, writing down the common multiple of the denominators.

$\frac{4r}{r+3} -\frac{5}{r} =\frac{4r(r)-5(r+3)}{r(r+3)} =\frac{4r^{2}-5r-15 }{r(r+3)}$

Thus, the answer is 4r² - 5r - 15 / r(r+3)

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3 years ago

The results of joes survey show that baseball is the favorite sport for 18 out of 25 people. What percent do not like sports?

charle [14.2K]

well if 18 out of 25 like it, then the remaining 7 doesn't like it, namely 7 out of 25.

if we take 25 to be the 100%, what is 7 off of if in percentage?

$\bf \begin{array}{ccll} amount&\%\\ \cline{1-2} 25&100\\ 7&x \end{array}\implies \cfrac{25}{7}=\cfrac{100}{x}\implies 25x=700\implies x=\cfrac{700}{25}\implies x=28$

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3 years ago

What happens if you fail just one elective in 7th grade?

topjm [15]

Answer: Honestly middle school grades, especially electives don't matter much. don't worry about it.

3 0

3 years ago

Read 2 more answers

Of the 75% of a group that passed a physical examination only 3/5 passed the additional psychological exam. What fraction of the

Helga [31]

To find the fraction of the grouo that passed both exams, we need to first convert 75% into a fraction:

75%
=75/100
=3/4

We can then mutiply the fraction above by the students who passed the psychological exam:

3/4×3/5
=9/20

Therefore the answer is 9/20.

Hope it helps!

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3 years ago

HELP, PLATO!!!!!!!

Keith_Richards [23]

Answer:

the law of cosines with ABC

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2 years ago