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3 years ago

What is the area of a regular pentagon with a side of 20 inches? can you explain?

Mathematics

1 answer:

san4es73 [151]3 years ago

6 0

here is the answer: A≈688.19in²

I cant really give you an explanation though

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HELP! What does X equal? WILL GIVE BRAINLIEST!

777dan777 [17]

Answer:

Step-by-step explanation:

PC=QC=RC

3x+7=51-x

3x+x=51-7

4 x=44

x=11

8 0

3 years ago

Giving thanks and brainliest whoever answers first!!!!!!

Alona [7]

$15

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3 years ago

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I need this Now (2x + 1)²

Alla [95]

Answer:

4x² + 4x + 1

Step-by-step explanation:

We know that (a + b)² = a² + 2ab + b², therefore, (2x + 1)² = 4x² + 4x + 1.

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3 years ago

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The perimeter of a rectangle is 72 cm. The length is 3 more than twice the width What

solmaris [256]

<h3>Solution</h3>

Given :-

Perimeter of rectangle = 72 cm
The length is 3 more than twice the width.

Find :-

Dimensions of rectangle

<h3 /><h3>Explantion</h3>

Using Formula

$\boxed{\underline{\tt{\red{\:(perimeter_{rectang}\:=\:2\times (Length+Width)}}}}$

Let,

Length of Rectangle = x cm
Breadth of Rectangle = y cm

According to question,

==> perimeter of Rectangle = 72

==> 2(x+y) = 72

==> x + y = 72/2

==> x + y = 36_________________(1)

Again,

==> x = 2y + 3

==> x - 2y = 3__________________(2)

Subtract equ(1) & equ(2)

==> y + 2y = 36 - 3

==> 3y = 33

==> y = 33/3

==> y = 11

keep in equ(1)

==> x - 2×11 = 3

==> x = 3 + 22

==> x = 25

<h3>Hence</h3>

Length of Rectangle = 25 cm
Width of Rectangle = 11 cm

<h3 />

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3 years ago

Bethany sells roses and petunias. The expression 3r+2.5p gives the cost (in dollars) of r roses and p petunias.What is the cost

Stella [2.4K]

3(7) + 2.5(8)
21 + 20
41

Hope this helps!

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3 years ago

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