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Nostrana [21]
3 years ago
7

A calculator costs $d. A school buys 90 calculators, and gets a $100 discount for bulk purchasing. How much did the school spend

?​
Mathematics
1 answer:
erik [133]3 years ago
4 0

Answer:

90d-100

Step-by-step explanation:

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In physics, Boyle’s law states that if the temperature is constant, then the pressure, P, of a gas is inversely proportional to
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The constant of proportionality for this situation is 425

Step-by-step explanation:

When a quantity is inversely proportional with another quantity, then

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1. If y is inversely proportional with x

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∵ In physics, Boyle’s law states that if the temperature is constant

∵ The pressure, P, of a gas is inversely proportional to the volume,

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∴ P ∝ \frac{1}{V}

∴ P = \frac{k}{V}

∵ The pressure of the gas in a cylinder is equal to 250 kilo pascals

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∴ 250 = \frac{k}{1.7}

- Multiply both sides by 1.7

∴ k = 425

The constant of proportionality for this situation is 425

Learn more:

You can learn more about proportion in brainly.com/question/10708697

#LearnwithBrainly

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What's the property that justifies my 1st step?
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Step-by-step explanation:

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