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Oliga [24]
3 years ago
15

A bag contained 120 marbles some are red and the rest are black there are 19 red marbles for every black marble.How many red mar

bles are in the bag
Mathematics
1 answer:
Salsk061 [2.6K]3 years ago
6 0

Answer:114 red marbles

Step-by-step explanation:

19r + 1b = 20

120/20=6 black marbles

19 x 6 = 114 red marbles

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Answer

Find out the how high up the wall does the ladder reach .

To proof

let us assume that the height of the wall be x .

As given

A 25-foot long ladder is propped against a wall at an angle of 18° .

as shown in the diagram given below

By using the trignometric identity

cos\theta = \frac{Base}{Hypotenuse}

now

\theta = 18^{\circ}

Base = wall height = x

Hypotenuse = 25 foot

Put in the trignometric identity

cos18^{\circ} = \frac{x}{25}

cos18^{\circ} = \bar{0.9510565162}

x = 23.8 foot ( approx)

Therefore the height of the  ladder be 23.8 foot ( approx) .

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3 years ago
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inna [77]
1.50x +2=y  Where x is how many miles and y is the total 
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3 years ago
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USPshnik [31]

Answer:

$204

Step-by-step explanation:

The question is at what price x will the company maximize revenue.

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The price for which the derivate of the revenue function is zero is the price the maximizes revenue:

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7 0
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Answer:

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Step-by-step explanation:

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Therefore, both yards cost the same.

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3 years ago
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I assume it is:

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2/(x-5), for x different to zero.
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3 years ago
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