3 years ago

Kirkwood lies between St.lous and rolla

Mathematics

1 answer:

Norma-Jean [14]3 years ago

5 0

What is the question supposed to be?

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Y + (-3 y2 ) +2( y2 - 6y) simplify

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Answer:

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Step-by-step explanation:

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2 years ago

An equilateral triangle has a perimeter of 48 cm. What is the area?

KiRa [710]

Answer:

$A=64\sqrt{3}\ cm^2$

Step-by-step explanation:

we know that

An equilateral triangle has three equal sides and three equal interior angles (each interior angle measure 60 degrees)

The perimeter is equal to

$P=3b$

where

b is the length side of the equilateral triangle

we have

$P=48\ cm$

substitute

$48=3b$

solve for b

$b=48/3\\b=16\ cm$

Find the area

The formula of area applying the law of sines is equal to

$A=\frac{1}{2}b^2sin(60^o)$

substitute the value of b

$A=\frac{1}{2}(16)^2sin(60^o)$

$sin(60^o)=\frac{\sqrt{3}}{2}$

$A=\frac{1}{2}(16)^2(\frac{\sqrt{3}}{2})$

$A=64\sqrt{3}\ cm^2$

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2 years ago

2) Brian purchased pens for 75 cents each and pencils for 40 cents each he

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Step-by-step explanation:

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3 years ago

Amy ate 2 1/2 cookies after lunch ,and 1 2/5 cookies after dinner.How many cookies did she eat altogether

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2 1/2 + 1 2/5 = 3 9/10...Please give brainliest....

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It's 3 triangles right ?? I just to make sure am right. How many triangles equal a Circle

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It is 3 triangles your right

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