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dem82 [27]
3 years ago
10

A contractor has installed a silt fence around an area that is semi-circular and level to prevent soil from the construction sit

e entering nearby streams. The diameter of the semi-circle is 1200 feet. How many linear feet of fence does the contractor need to use to enclose the area?
Mathematics
1 answer:
VLD [36.1K]3 years ago
6 0
Required length is pi x d/2 = 1200/2 x pi = 600 pi feet = 1,885 feet.
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Solving the given equation, the value of v that makes the statement true is:

A. v = 8.

<h3>What is the given equation?</h3>

The equation is:

12 = 12 + \frac{v - 8}{2}

Hence:

\frac{v - 8}{2} = 0

Applying cross multiplication:

v - 8 = 0

v = 8.

Hence option A is correct.

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Johnny has graded 20% of his 150 students papers how many papers does he still need to finish grading ?
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What is 2x+3+8x=3x+9x+7
Reika [66]

Answer:

x=-2

Step-by-step explanation:

Hey there!

In order to solve this equation, you need to combine like terms

The equation after combining the x terms and the contants will look like this

10x+3=12x+7

Now you have to take 10x away from both sides

3=2x+7

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Simplify

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divide 2 on both sides to get x by itself

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She should randomly select campers period, because she wants to estimate the percentage of "campers that ride once a week" and not for example what percentage of campers who ride that ride once a week...
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£70 is divided between Natasha, Richard &amp; Stephen so that Natasha gets twice as much as Richard, and Richard gets three time
Korvikt [17]

The share of Natasha is £ 42

<em><u>Solution:</u></em>

£70 is divided between Natasha, Richard & Stephen

Total amount = 70

Let the share of natasha be "x"

Let the share of richard be "y"

Let the share of stephen be "z"

Natasha gets twice as much as Richard

x = 2y ------ eqn 1

Richard gets three times as much as Stephen

y = 3z

z = \frac{y}{3} ----- eqn 2

Total amount = 70

share of natasha + share of richard + share of stephen = 70

x + y + z = 70

Substitute eqn 1 and eqn 2

2y + y + \frac{y}{3} = 70\\\\\frac{6y+3y+y}{3} = 70\\\\10y = 210\\\\y = 21

Substitute y = 21 in eqn 1

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x = 42

Thus natasha gets £ 42

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