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RideAnS [48]
3 years ago
11

9(n+3)=7n-3 and steps please

Mathematics
1 answer:
Grace [21]3 years ago
6 0
9n + 27 = 7n -3
2n + 27 = -3
2n = -30
n = -15
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In this circle, the area of sector COD is 50.24 square units. The radius of the circle is units , and units.
maks197457 [2]

Let angle be alpha

\\ \rm\Rrightarrow Area=50.24

\\ \rm\Rrightarrow \dfrac{\alpha}{360}\pi r^2=50.24

\\ \rm\Rrightarrow \alpha 3.14r^2=18086.4

\\ \rm\Rrightarrow \alpha r^2=5760

\\ \rm\Rrightarrow r^2=\dfrac{5760}{\alpha}

\\ \rm\Rrightarrow r=\sqrt{\dfrac{5760}{\alpha}}

If you have angle measure in degree put in place of Alpha and get the value elaw this is our final answer

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2 years ago
A cylinder has a height that is twice the length of the diameter. The diameter of the cylinder is 10 centimeters. What is the su
siniylev [52]

Answer:

Step-by-step explanation:

Givens

pi = 3.14

d = 10 cm

h = 2*d

Formula

  • The top of the cylinder is a solid circle. So the area of the circle is pi r^2
  • There is both a top and bottom to the circle so the fomula is 2*pi*r^2

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  • Then you just multiply by the height.
  • formula = 2*pi * r * h

The combined formula is given below.

SA = 2*pi*r^2  +  2*pi*r * h

Conversions

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h = 2*10

h = 20 cm

r = d/2

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r = 5cm

Solution

SA = 2*pi*r^2  +  2*pi*r * h

SA = 2*3.14*5^2 + 2*3.14*5*20

SA = 157 + 628

SA = 785 cm^2

Answer: The surface area is 785 cm^2

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3 years ago
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Answer:

2 inches per hour, 5 inches, y=2x+5

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8 0
3 years ago
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Volgvan

Answer:

Step-by-step explanation:

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3 years ago
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