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crimeas [40]
3 years ago
13

3x-7y=-28 Need help solving the question

Mathematics
1 answer:
Valentin [98]3 years ago
7 0
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Simplifying

3x + 7y = 28


Solving

3x + 7y = 28


Solving for variable 'x'.


Move all terms containing x to the left, all other terms to the right.


Add '-7y' to each side of the equation.

3x + 7y + -7y = 28 + -7y


Combine like terms: 7y + -7y = 0

3x + 0 = 28 + -7y

3x = 28 + -7y


Divide each side by '3'.

x = 9.333333333 + -2.333333333y


Simplifying

x = 9.333333333 + -2.333333333y

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The price of gold has increased by 35% per year from 2000 in the year 2000 hairy bought a gold ring for $590 which of the follow
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Since the price is increasing by percentage, rather than a constant rate, we will be using the exponential equation format, which is y=ab^x (a = initial value, b = growth/decay)

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Since the value is *increasing* by 35%, add 1 and 0.35 (35% in decimal form) together to get 1.35. 1.35 is going to be your b variable.

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Answer:

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Step-by-step explanation:

Let x represent the number of lawns Jacob mowed and y represent the number of dogs Sarah walked.

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Sarah charges $10 each time she walks a dog, then she earns $10y for y dogs walked.

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Note that x\ge 0,\ y\ge 0.

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