Which equation represents a proportional relationship a)y=5+x ,b) y=4x, c)y=7x2 ,d)y=2-x

Mathematics

1 answer:

Mazyrski [523]3 years ago

3 0

If x and y are proportional then the quotient y and x is constant.

$\dfrac{y}{x}=a=constant$ <em>multiply both sides by x</em>

$y=ax$

<h3>Your answer is b) y = 4x</h3>

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Answer: the cost of a cheeseburger is $4

Step-by-step explanation:

Let x represent the cost of one cheeseburgers.

Let y represent the cost of one Soda.

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She also sells 3 cheeseburgers and 2 sodas for $18.00. It means that

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Multiplying equation 1 by 3 and equation 2 by 2, it becomes

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This isn't a math question and should be in the science section. However, I will still answer the question. The answer is choice B.

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Here's a further breakdown

A. False. The radiation or energy from the sun can travel through air or else you wouldn't feel the sun's rays. Also, plant life wouldn't be alive without that energy going through the air.

B. True. The rays travel through a vacuum of space. If they couldn't travel through space, then the same problem comes up as in choice A: the issue of not feeling the sun's rays.

C. False. They rays have different frequencies. Because there are many wavelengths (see choice D below), this means there are different frequencies. Recall that f = 1/w where f is the frequency and w is the wavelength.

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