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Whitepunk [10]
3 years ago
5

How to find the area of a equilateral triangle that has a perimeter of 21?

Mathematics
1 answer:
Romashka-Z-Leto [24]3 years ago
8 0
First, we have to find the length of each side of triangle. Equilateral triangle means 3 sides r in same length, so each side will be 21 ÷ 3 = 7
Now we need to calculate the height of the triangle. We can do this by Pythagoras theorem
Let the height be h
(7/2)^2 + x^2 = 7^2
The area should be 6.0621778265
Or u can say 6.06 corrected to 3 sig fig
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Which equation describes the line with a slope of -3 that contains the point (2,4)?
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Answer: y = 2x - 11

Step-by-step explanation:

A linear equation has the following form.

y = a . x + b

where,

y: independent variable

a: slope

x: independent variable

b: y-intercept

The slope is 2, so a is 2. The ordered pair (4, -3) means that when x takes the value 4, y takes the value -3. We can replace these values in the general equation to find the y-intercept.

y = a . x + b

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b = -11

The linear equation is

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Andreas93 [3]

Answer:

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Step-by-step explanation:

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Jaydon has eaten 3.6% his 45 ounce block of chocolate
elena-s [515]

Answer:

The answer is 1.62 ounce

Step-by-step explanation:

<h3><u>Given</u>;</h3>
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Now,

3.6% of his 45 ounce

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Thus, Jaydon has eaten 1.62 ounce block of chocolate fudge.

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