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3 years ago

Find the shaded area. Round to the nearest tent.

Mathematics

2 answers:

Lapatulllka [165]3 years ago

7 0

Um...
Okay,
We see that there are to shapes- semi circle and trapezoid
Area of the semicircle:
1/2πr^2
r=4.5 cm
A≈31.8 square cm.

Area of the trapezoid=1/2(b1+b2)h
h=2r
h=9cm
b1=9.5cm
b2=12 cm
A=96.75 square cm
A=96.75+31.8
A≈128.55 square cm is your final answer. Hope it help!

Margaret [11]3 years ago

5 0

Well, split into two parts then multiply the sides and then round it to the nearest tenth.

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masha68 [24]

Answer:

Step-by-step explanation:

We know that the permiter is defined as

$P=L+S+M$

Where $L$ is the longest side, $S$ is the smallest and $M$ is the middle side.

If $L=x$ then, $S=x-20$ , where we need to find an expression for $M$ using the law of cosines.

$M^{2} =L^{2}+S^{2}-2 \times L \times S \times cos(60\°)\\M=\sqrt{x^{2}+(x-20)^{2}-x(x-20)}\\M=\sqrt{x^{2} +x^{2}-40x+400-x^{2}+20x}=\sqrt{x^{2}-20x+400}$

Replacing all expression, the perimeter is

$P=x+x-20+\sqrt{x^{2}-20x+400}\\P=2x-20+\sqrt{x^{2}-20x+400}$

Using a calculator, the perimeter is 20 units centimeters.

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3 years ago

How do i solve 9j-8=8+9j

SIZIF [17.4K]

9j-8=8+9j

+8 to each side:
9j=16+9j

-9j from each side:
0=16
Which is false.

Hope this helps :)

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4 years ago

What is the slope of y=x+5

Ghella [55]

Answer:

m = 1

Step-by-step explanation:

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3 years ago

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svp [43]

Answer: 66

Step-by-step explanation:

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3 years ago

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kirill115 [55]

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3 years ago