3 years ago

A bag contains 3 red marbles and 5 blue marbles.

Mathematics

1 answer:

alexira [117]3 years ago

4 0

The probability would be 5/16 for selecting a blue marble twice without putting it back.

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Step-by-step explanation:

33.366/6.7= 4.98

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What is the least common denominator for these two rational expressions n^4/n^2+2n+1,7/n^2-8n-9

sergeinik [125]

Answer:

Step-by-step explanation:

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3 years ago

What is the slope of a line perpendicular to the line whose equation is 3x+6y=-183x+6y=−18. Fully reduce your answer.

schepotkina [342]

Answer:

Step-by-step explanation:

The given equation of line is

$3x+6y=-18$

We need to find the slope of a line which is perpendicular to the given line.

The given equation can be rewritten as

$3x+6y+18=0$ ...(i)

If a line is defined as $ax+bx+c=0$ , then the slope of the line is

$m=-\dfrac{a}{b}$

In equation (i), a=3, b=6 and c=18. So, slope of the line is

$m_1=-\dfrac{3}{6}=-\dfrac{1}{2}$

Let $m_2$ be the slope of perpendicular line.

We know that product of two perpendicular line is -1.

$m_1\cdot m_2=-1$

$(-\dfrac{1}{2})\cdot m_2=-1$

Multiply both sides by -2.

$m_2=2$

Therefore, the slope of perpendicular line is 2.

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3 years ago