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Norma-Jean [14]
3 years ago
12

Explain how knowing 50 x 4 = 200 helps you find 500 X 400?

Mathematics
1 answer:
Simora [160]3 years ago
4 0
If you know the answer to 50 x 4 = 200 then you can just add the other zeros
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After a bride has interviewed 7 DJs to play at her wedding, her fiance tells her she needs to narrow it down to 4 DJs. In how ma
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Answer:

840

Step-by-step explanation:

Given

DJs = 7

To\ pick = 4

Required

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The term "ranking" as used in this question implies permutation and the required is calculated using:

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^nP_r = \frac{n!}{(n-r)!}

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^7P_4 = \frac{7!}{3!}

^7P_4 = \frac{7 * 6 * 5 * 4 * 3!}{3!}

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katrin2010 [14]

Answer:

230 - 151 + 180 + (43 - 12) = 290

Step-by-step explanation:

Use PEMDAS.

Evaluate the expression in the parentheses:

230 - 151 + 180 + (43 - 12)

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<em>None of the given options are correct. </em>

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