A fastfood coffee chain sells 780-gram bags of ground coffee for $16.99. Rhonda bought 3.9 kg. How much did she spend on coffee?

$84.95

Step-by-step explanation:

Convert 3.9 kilograms to grams.

3900 grams.

Divide 3900 by 780.

The answer is 5.

Multiply 5 by $16.99

5 · 16.99 = $84.95

Rhonda spent $84.95 on coffee.

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for this case we have by definition, if two lines are perpendicular, then the product of their slopes is -1.

then, given the following line:

so,

we are looking for m_ {2}:

then, the line is given by:

we find "b" replacing the given point:

finally, the equation is:

option c