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4 years ago

Question:

1 answer:

6 0

The answer is y=20 because if they’re proportional then they increase at the same rate. to get from c=3 to x=15 u multiply by 5 and dice x and y are proportional you would multiply the y value, y=4 by 5 to get y=20

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We can conclude that Collin will have £3691.41 in his account after 10 years.

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3 years ago

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3 years ago

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please tell me how does 20 times 30 equal 90 please tell me so i can tell my teacher about iready so i dont have to do it

Alja [10]

Answer:

20*30=600

This could be written out with addition instead, as 20 'times' 30

30+30+30+30+30+30+30+30+30+30+30+30+30+30+30+30+30+30+30+30

=600

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3 years ago

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Luba_88 [7]

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3 years ago

In parallelogram ABCD point K belongs to diagonal

Maksim231197 [3]

Answer:

$\dfrac{BE}{EC}=\dfrac{1}{3}.$

Step-by-step explanation:

Consider triangles BKE and DKA. In this triangles:

$\angle BKE=\angle DKA$ as vertical angles;
$\angle KBE=\angle KDA$ as alternate interior angles (lines BC and AD are parallel and BC is a transversal);
$\angle BEK=\angle DAK$ as alternate interior angles (lines BC and AD are parallel and BE is a transversal).

Thus triangles BKE and DKA are similar by AA theorem. Similar triangles have proportional sides lengths:

$\dfrac{BK}{KD}=\dfrac{BE}{AD}\Rightarrow \dfrac{1}{4}=\dfrac{BE}{AD}.$

Thus, $AD=4BE.$

Since AD=BC and BC=BE+CE, we have that 4BE=BE+EC, EC=3BE. Hence, the ratio BE to EC is

$\dfrac{BE}{EC}=\dfrac{BE}{3BE}=\dfrac{1}{3}.$

3 0

3 years ago