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VMariaS [17]
3 years ago
12

The circumference of a coin is 7.42 cm. What is the area? using 3.14 for π

Mathematics
1 answer:
salantis [7]3 years ago
8 0
By the question,
π = 3.14
circumference = 7.42 cm
or,. 2πr. =7.42
or,. 2×3.14×r. =7.42
or,. 6.28r. =7.42
or,. r. =7.42÷6.28
∆. r. =1.18 cm
Again,
Area of circumference= πr^2
=3.14 × 1.18^2
=3.14 × 1.39
=4.37 cm^2
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Answer:

x=−2

Step-by-step explanation:

1 Expand.

6-2x-12=3x+4

6−2x−12=3x+4

2 Simplify  6-2x-126−2x−12  to  -2x-6−2x−6.

-2x-6=3x+4

−2x−6=3x+4

3 Add 2x2x to both sides.

-6=3x+4+2x

−6=3x+4+2x

4 Simplify  3x+4+2x3x+4+2x  to  5x+45x+4.

-6=5x+4

−6=5x+4

5 Subtract 44 from both sides.

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−6−4=5x

6 Simplify  -6-4−6−4  to  -10−10.

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−10=5x

7 Divide both sides by 55.

-\frac{10}{5}=x

−

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8 Simplify  \frac{10}{5}

5

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-2=x

−2=x

9 Switch sides.

x=-2

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Step-by-step explanation:

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