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yanalaym [24]
2 years ago
8

alright so ya girl is in 7th grade. i got math hw and i need some help urgent! here's the question: The suspect has been withdra

wing money from the ATM machine with a stolen debit card. The account he was stealing from initially contained 5,000 dollars. He's been withdrawing 45 dollars every day, and the account now has 1895 dollars. How long has he been withdrawing money? PS, if you can include an equation that shows what's happening in the problem. xoxo
Mathematics
1 answer:
Sonbull [250]2 years ago
3 0

He has been withdrawing money for 69 days.

Step-by-step explanation:

Amount of credit card = $5000

Let,

x be the number of days

Amount after withdrawing $45 each day for x days = $1895

Amount left = Total amount - Withdrawal amount per day * number of days

1895 = 5000 - 45*x

1895=5000-45x

Solving for x;

1895-5000=-45x\\-3105=-45x\\-45x=-3105

Dividing both sides by -45

\frac{-45x}{-45}=\frac{-3105}{-45}\\x=69

He has been withdrawing money for 69 days.

Keywords: subtraction, division

Learn more about subtraction at:

  • brainly.com/question/3756853
  • brainly.com/question/3763153

#LearnwithBrainly

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sveta [45]

Answer:

The sample standard deviation is 15.3.

Step-by-step explanation:

Given data items,

84, 85, 83, 63, 61, 100, 98,

Number of data items, N = 7,

Let x represents the data item,

Mean of the data points,

\bar{x}=\frac{84+85+83+63+61+100+98}{7}

=82

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\sigma= \sqrt{\frac{1}{N-1}\sum_{i=1}^{N} (x_i-\bar{x})^2}

=\sqrt{\frac{1}{6}\sum_{i=1}^{7} (x_i-82)^2}

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4 0
2 years ago
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Answer:

Given:

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19.2

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25.6

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22.4

32.4

24.9

28.6

37.7

26.1

21.8

21.2

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Constructing a frequency distribution beginning with a lower class limit of 15.0 and use a class width of 6.0.

we have:

Body Mass Index____ Frequency

15.0 - 20.9__________3( values of 17.7, 18.3, & 19.2 are within this range)

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27.0 - 32.9____________ 5 values

33.0 - 38.9____________ 2 values

39.0 - 44.9 _____________2 values

The frequency distribution is not a normal distribution. Here, although the frequencies start from the lowest,  increases afterwards and then a decrease is recorded again, it is not normally distributed because it is not symmetric.

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a. We're looking for a such that

\displaystyle\int_1^a\frac{\mathrm dx}{x^2}=\int_a^4\frac{\mathrm dx}{x^2}

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1-\dfrac1a=\dfrac1a-\dfrac14

\dfrac54=\dfrac2a\implies\boxed{a=\dfrac85}

b. Integrating with respect to y will make things easier.

y=\dfrac1{x^2}\implies x=\dfrac1{\sqrt y}

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3 0
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