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Alla [95]
3 years ago
6

What is the area of a circle with a diameter of 24 meters (use 3.14 for Pi)?

Mathematics
1 answer:
Zarrin [17]3 years ago
5 0

The area of a circle is represented by the equation:


A=\pi r^{2}


We know that the diameter is two times the radius: d=2r


So if we know that the diameter of the circle is 24m, we can divide this by two in order to get the radius:


24m=2r -->r=12m


So then we can plug this radius in to the equation for the area of a circle:


A=\pi (12)^{2}


A=144\pi


We are told to use 3.14 as pi, and not pi itself, so let's plug in 3.14 for pi:


A=3.14(144)


A=452.16m^{2}


Now we know that the area of this circle is 452.16 square meters.

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Solve the system of equations for x and y.<br> y = x + 5<br> y = 2x + 2
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Explanation:
using the
substitution method
y
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−
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→
(
1
)
y
=
−
2
x
+
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2
)
since both equations are expressed in terms of x we

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⇒
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−
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add 2x to both sides
2
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+
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−
5
=
−
2
x
+
2
x
+
4
⇒
3
x
−
5
=
4
add 5 from both sides
3
x
+
5
−
5
=
4
+
5
⇒
3
x
=
9
divide both sides by 3
3
x
3
=
9
3
⇒
x
=
3
substitute this value in
(
1
)
y
=
3
−
5
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2
As a check
substitute these values into
(
2
)
right
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3 0
3 years ago
Which of the following equations represents a line that is parallel to the line 3x - 2y = 12
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Step-by-step explanation:

12=3x-2y

2y+12=3x

2y=3x-12

y=(3x-12)/2

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3 years ago
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ra1l [238]

Answer:

2

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