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Sunny_sXe [5.5K]
3 years ago
12

Jarred wants to buy a go-cart for $1,200. His part-time job pays him $160 a week. He has already saved $400. Which inequality re

presents the minimum number of weeks (w) he needs to work, in order to have enough money to buy the go-cart?
Mathematics
1 answer:
STatiana [176]3 years ago
4 0

Answer:

He will need to work a minimum of 5 weeks

Step-by-step explanation:

1,200-400=800

800 divded by 160=5

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Answer:

If this is the sample data, the sample variance is 125.07 and the sample standard deviation is 11.18

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Step-by-step explanation:

We are given the following data-set:

70, 65, 71, 78, 89, 68, 50, 75

Deviations from the mean

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Sample size, n = 8

Sample:

\text{Standard Deviation} = \sqrt{\displaystyle\frac{\sum (x_i -\bar{x})^2}{n-1}}  

where x_i are data points, \bar{x} is the mean and n is the number of observations.

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0.5625 + 33.0625 + 0.0625 + 52.5625 + 333.0625 + 7.5625 + 430.5625 + 18.0625 = 875.5

s = \sqrt{\dfrac{875.5}{7}} = 11.18

\text{ Sample variance} = s^2 = 125.07

Population:

\text{Standard Deviation} = \sqrt{\displaystyle\frac{\sum (x_i -\bar{x})^2}{n}  

where x_i are data points, \bar{x} is the mean and n is the number of observations.

Sum of squares of differences =

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\sigma = \sqrt{\dfrac{875.5}{8}} = 10.46

\text{ Population variance} = \sigma^2 = 109.44

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3 years ago
The price of an item has dropped to
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60% decrease.

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3 years ago
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