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iogann1982 [59]

2 years ago

7

It take Rick 5 minutes to wash 4 dishes. If he continue to work at this rate.how many minutes will it take Rick to wash 24 dishe

s?

1 answer:

juin [17]2 years ago

4 0

5 minutes x minutes

--------------- = -------------

4 dishes 24 dishes

using cross products

5 * 24 = 4 * x

divide each side by 4

5*24/4 = x

30=x

It will take 30 minutes

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Step-by-step explanation:

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Here, let M(a) = b

⇒The equation becomes $b = -\frac{3}{4} a-12$

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<u>1) FOR (-9,0)</u>

$RHS is -\frac{3}{4} (-9)-12 = -5.25 \neq 0$

Hence, (-9,0) is NOT on the graph.

<u>2) FOR (-16,0)</u>

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Hence, LHS = RHS = 0 So, (-16,0) is on the graph.

<u>3) FOR (0,12)</u>

Here, LHS = b = 12

$RHS is -\frac{3}{4} (0)-12 = -12 \neq 12$

Hence, (0,12) is NOT on the graph.

<u>4) FOR (0,-12)</u>

Here, LHS = b = -12

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and LHS = RHS = -12

Hence, (0,-12) is on the graph.

Hence, (-16, 0) and (0,-12) are exactly two points on the graph of the given equation.

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