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3 years ago

Are lines y=-x-4 and 5x+5y=20 perpendicular?

1 answer:

6 0

The lines consider perpendicular if (the slope of line 1) * (the slope of line 2) = -1
so get the slope of the lines ,1st put the equation on the form of y = mx+c
where the coefficient of x (m) is the slope
y=-x-4 .... m1= -1
5x+5y=20
y=-x+4 .... m2 = -1
so m1 * m2 = -1 * -1 = 1
then, the two lines aren't perpendicular

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Can somone please explain math like this to me?

Vladimir [108]

So 9/24 = 3/x. 9/3 =3 so divide 24 by 3 also

the answer is 9/24 = 3/8 x=8

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3 years ago

A waste management survey collected data about the types of materials that were recycled by three different states in

Lelechka [254]

As a percentage, the relative frequency of plastics recycling in New Mexico in 2008 compared to plastics recycled in all three states combined is approximately <u>11%</u>.

<h3>What is relative frequency?</h3>

A relative frequency measures the proportion of events that occur within a class out of the total number of observations.

When using relative frequency, the results are usually displayed in percentages, proportions, and fractions.

<h3>Data and Calculations:</h3>

Year State Recycled Plastics Relative

(thousands of tons) Frequency

2008 New Mexico 500 0.111 (500/4,500)

2008 New York 1,500 0.333 (1,500/4,500)

2008 Texas 2,500 0.566 (2,500/4,500)

Total 4,500 1

Thus, the relative frequency of plastics recycling in New Mexico in 2008 compared to plastics recycled in all three states combined is approximately <u>11%</u>.

Learn more about relative frequency at brainly.com/question/3857836

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6 0

2 years ago

Liza put some books on a shelf. The list below shows the mass of each book in ounces.

natka813 [3]

Answer:

Step-by-step explanation:

Order the numbers.

5, 5, 5, 8, 8, 9, 9

The total numbers in the list is 7.

7/2 is between 3 to 4

Choose the middle number in ordered list:

5, 5, 5, 8, 8, 9, 9

answers is 8

8 0

3 years ago

Plz help me i am stuck

Minchanka [31]

Given:

The two statements.

To find:

The probability of an impossible event.

The probability of a certain event.

Solution:

Formula for probability is:

$P=\dfrac{\text{Possible favorable outcomes}}{\text{Total number of outcomes}}$

For an impossible event, the possible favorable outcomes is 0. So,

$P=\dfrac{0}{\text{Total number of outcomes}}$

$P=0$

For a certain event (sure event), the possible favorable outcomes is equal to total number of outcomes. So,

$P=\dfrac{\text{Total number of outcomes}}{\text{Total number of outcomes}}$

$P=1$

Therefore, an event that is impossible has probability 0 and an event that is certain has probability 1.

8 0

3 years ago

Madeline has used 50 sheets of a roll of paper towels, which is 5/8 of the entire roll. The equation 5/8s = 50 can be used to fi

raketka [301]

Answer:

s=80

Step-by-step explanation:

5/8ths is .625

80 x .625 =50

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4 years ago