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bixtya [17]
3 years ago
9

How do you use the slope to prove lines are parallel or perpendicular?

Mathematics
1 answer:
Murljashka [212]3 years ago
4 0
The slope for parallel lines are the same and the slope of perpendicular lines are negative reciprocals
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A student earned grades of 84, 78, 84, and 72 out of 100 on her four regular tests. She scored 78% on the final exam and 86% on
adelina 88 [10]

If the student received marks of 84, 78, 84, and 72 on her four normal tests, her weighted mean grade is 81.2 percent.

<h3>What is mean?</h3>

The mean is described as a single number that indicates either the closed value for each item in the collection of data or the mean value for the whole set of data.

On her four regular tests, a student had grades of 84, 78, 84, and 72 out of 100. She received 86 percent on her class projects and 78 percent on the final test.

You may compute the weighted mean as follows:

\rm W_m= 0.4 \times ( \frac{84+78+84+72}{4} )+0.3 \times 78 +0.1 \times 86 + 0.2 \times 87 \\\\ W_m=  81.2 \%

Hence, if the student had marks of 84, 78, 84, and 72 on her four normal tests, her weighted mean grade would be 81.2 percent.

To learn more about the mean refer;

brainly.com/question/22871228

#SPJ1

5 0
2 years ago
Becky is 18 and would like to buy a house when she is 36. What is the discount factor for today's prices if the housing values i
statuscvo [17]
<span>you need to find the amount of years between now and when she wants to buy a home. 36-18= 18. then you take 18 and multiply is by %6. 18x%6 or 18x.06 =108% or 1.08. 

The discount prices for today's housing values compared to 18 years from now with a 6% increase per year would be 108% discount. </span>
3 0
3 years ago
Each of the 459 guests attending the Honor Roll breakfast gets a muffin. Muffins come in packages of 12. How many packages are n
baherus [9]

Answer:

38.25 packages

Step-by-step explanation:

Number of guests = 459

Each guest gets 1 muffin

Muffin comes in packages of 12

Hence,

The number of packages is calculated as:

459/12 = 38.25 packages

Hence, 38.25 packages are needed so there are enough muffins for every guest.

7 0
3 years ago
Find the missing length indicated ​
tiny-mole [99]

Answer:

x = 256

Step-by-step explanation:

Remark

Interesting question. Thanks for posting.

The small triangle has the height as the missing side.

Part One: Givens

a = 144

b = height = ?

c = 240

a^2 + b^2 = c^2

144^2 + b^2 = 240^2

20736 + b^2 = 57600                   Subtract 20736 from both sides

b^2 = 57600 - 20736

b^2 = 36864

√b^2 = √36864

b = 192

Solve for x

The relationship between the height (b) and 144 and x is

b^2 = 144 * x

36864 = 144x          Divide by 144

x = 256

5 0
3 years ago
PLEASE HELP THIS WAS DUE LAST WEEK!!!!!!!!!!!!!
GrogVix [38]

Answer:

Zack is correct

Step-by-step explanation:

when we plot out all the points we see that not all sides are the same length, which is techinally defines a square. Because of the different sides lengths we know it is a rhombus.

3 0
3 years ago
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