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igomit [66]
3 years ago
15

standard cars have 4wheels and standard semitrucks have 18 wheels. if only cars and semitrucks are parked in certain lot, the to

tals number of wheels can be expressed by w=4c+18t. How can this equation be solved for c?
Mathematics
1 answer:
pogonyaev3 years ago
5 0
 i think that it is....... c= (W - 18t)/4
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Strike441 [17]

Answer:

x=±\sqrt{15/2}

Step-by-step explanation:

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3 years ago
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Rajan needs 1 liter of 15% hydrochloric acid solution for an experiment. He checks his storage cabinet, but he only has a 5-lite
yarga [219]

Answer:

<em>Rajan must use </em><em>0.75</em><em> liters of 5% hydrochloric acid solution and </em><em>0.25</em><em> liters of 45% hydrochloric acid solution.</em>

Step-by-step explanation:

Let us assume that, x liters of the 5% hydrochloric acid and y liters of the 45% hydrochloric acid solutions are combined.

As Rajan need total of 1 liter of solution, so

x+y=1

i.e x=1-y --------------------1

As Rajan needs 5% hydrochloric acid and 45% hydrochloric acid to make a 1 liter batch of 15% hydrochloric acid, hence acid content of the mixture of two acids will be same as of the final one, so

0.05x+0.45y=1\times 0.15

i.e 5x+45y=15 -------------2

Putting value of x from equation 1 in equation 2,

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\Rightarrow 5+40y=15

\Rightarrow 40y=15-5=10

\Rightarrow y=0.25

Putting the value of y in equation 1,

x=1-0.25=0.75

Therefore, Rajan must use 0.75 liters of 5% hydrochloric acid solution and 0.25 liters of 45% hydrochloric acid solution.

5 0
3 years ago
The number of marbles of different colors stored in a hat is listed below:
Kamila [148]
There is a 1/4 chance of getting the Blue Marble out of the bag. But when it is 2 in a row you have to multiply your chances so it would be 1/4 * 1/4 or 1/16
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tankabanditka [31]

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Step-by-step explanation:

John had d amount of chocolate bars to sell for a school fundraiser. He sold 32 of them and was left with 64.

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2x=11-3
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