# Triangles ABC and DEF are similar. If DE = 9, EF = 7, and AB = 4.5, what is BC?

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Since triangles ABC and DEF are similar, corresponding sides are proportional. Therefore, we can set up the proportion:

[ \frac{AB}{DE} = \frac{BC}{EF} ]

Plugging in the given values:

[ \frac{4.5}{9} = \frac{BC}{7} ]

Solving for BC:

[ BC = \frac{4.5 \times 7}{9} = \frac{31.5}{9} = 3.5 ]

So, BC is 3.5.

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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