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3 years ago

Riley used this graph to compare two movie-rental plans.

Mathematics

1 answer:

tatiyna3 years ago

4 0

Answer:

The 3 statements that are correct are:

<em><u>1. "Plan A offers fewer movies than Plan B for monthly costs greater than 20$"</u></em>

<em><u>2. "The two plans cost the same for 10 movies per month"</u></em>

<em><u>3. "The two plans offer the same number of movies for 20$ a month."</u></em>

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<h3>Right triangles </h3>

Right triangles have a pair of perpendicular lines

Coordinates

The coordinates are given as:

D = (-2,-1)
E = (-2,2)
F = (0,0)

<h3>Slopes</h3>

Start by calculating the slopes of lines DF and EF using:

$m = \frac{y_2 -y_1}{x_2 -x_1}$

So, we have:

$m_{DF} = \frac{0 + 1}{0 +2}$

$m_{DF} = \frac{1}{2}$

Also, we have:

$m_{EF} = \frac{0 -2 }{0+2}$

$m_{EF} = \frac{-2 }{2}$

$m_{EF} = -1$

For the triangle to be a right triangle, then the calculated slopes must be opposite reciprocals.

i.e.

$m_1 = -\frac{1}{m_2}$

By comparison, the slopes of both lines are not opposite reciprocals.

Hence, the true statement is (c)