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2 years ago

How can a percent be used to describe a change in quantity?

Mathematics

1 answer:

Anestetic [448]2 years ago

5 0

Answer:

remember,a percent means "per 100".You can describe the change as a fraction comparing the amount of change to the original and then use a proportion to rewrite your problem as a percentage out of 100.

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6 + x is an example of a variable an expression a constant a formula

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2 years ago

Which equation represents a line that passes through (2,-1/2) and has a slope of 3 ?

Anna11 [10]

Answer:

C. $y + \frac{1}{2} = 3(x - 2)$

Step-by-step explanation:

Given

$Point: (2,\frac{-1}{2})$

$Slope: 3$

Required

Equation of line

Let m represents the slope of the line;

m is calculated as thus

$m = \frac{y - y_1}{x - x_1}$

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By substituting the right values in the formula above;

$m = \frac{y - y_1}{x - x_1}$ becomes

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Multiply both sides by $(x - 2)$

$3 *(x - 2) = \frac{y - \frac{-1}{2}}{x - 2} *(x - 2)$

$3 *(x - 2) = (y - \frac{-1}{2})$

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Reorder

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Hence, the equation that represents the line is $y + \frac{1}{2} = 3(x - 2)$

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3 years ago

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