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wel
2 years ago
12

Mario earned three times as much money last year as his wife Elena. The total amount that the two earned was $11,000. How much m

oney did Mario earn?
Mathematics
1 answer:
OLEGan [10]2 years ago
6 0
Mario earns $8.250. Solution:
Elena = x
MArio = 3x

Equation:
x + 3x = 11,000
4x = 11,000
x = 2,750

Mario = 3x ; 3(2,750) = 8,250
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Liono4ka [1.6K]

Answer:

Option C.

Step-by-step explanation:

It is given that,

Total number of applicants = 9

Number of job = 3

We need to select 3 applicants out of 9. So, the required number of ways is

^9P_3=\dfrac{9!}{(9-3)!}

^9P_3=\dfrac{9\times 8\times 7\times 6!}{6!}

^9P_3=9\times 8\times 7

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Therefore, there are ^9P_3=504 ways the positions can be filled because the order in which the applicants are chosen matters.

Hence, the correct option is C.

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2 years ago
Find the price of each item.
Solnce55 [7]

Answer:

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Step-by-step explanation:

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2 years ago
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8 0
2 years ago
Adult men have heights that a normally distributed with a mean of 69.5 inches and a standard deviation of 2.4 inches. Adult wome
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Answer:

Step-by-step explanation:

From the information given:

For Adult Men

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Standard deviation \sigma = 2.4

observed value X = 74

For Adult Women

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For Adult Women :

z = \dfrac{X- \mu}{\sigma}

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z = \dfrac{6.2}{2.6}

z = 2.3846

Thus; we can conclude that , the women is more unusually tall within his or her respective sex

5 0
3 years ago
Calculate the volume of blood moved per minute by a heart at rest.A heart "at rest" beats at a rate of 72 beats per minute and m
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Answer:

70 X 72 = 5040 mL per minute

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2 years ago
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