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3 years ago

8

Valentine purchased 200 beads for $48 to make necklaces. If she needs to buy 25 more beads,how much will she pay if she is charg

ed the same rate?

1 answer:

dlinn [17]3 years ago

3 0

Fire: you need you show ur understanding by Dividing ur Amount By ur Total Which is 48 ÷ 200$ and that give your rage which is 0.24 per bead.

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Mischa wrote the quadratic equation 0=-x^2+4x-7 in standard form. If a = -1, what is the value of c in her equation?

gayaneshka [121]

The correct answer
C= -7

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3 years ago

Jordan wants to buy a bike that is selling for $79.99. What is the total cost

OleMash [197]

Answer:

84.7894

= Rounded to the nearest cent= 84.79

Step-by-step explanation:

79.99*1.06= 84.7894

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Name the sets of numbers to which each number belongs

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3 years ago

The oil prices for 2014, rounded to the nearest dollar, were: 95, 101, 101, 102, 102, 106, 104, 97, 93, 84, 76, 59. what is the

kipiarov [429]

Interquartile Range (IQR) = $Q_3-Q_1$ , with $Q_3$ as the upper quartile and $Q_1$ as the lower quartile.

Firstly, rearrange the data so that it's in ascending order: $\{59,76,84,93,95,97,101,101,102,102,104,106\}$

Next, find the median:

$\{59,76,84,93,95,\boxed{97,101,}101,102,102,104,106\}\\\\\frac{97+101}{2}\\\\\frac{198}{2}\\\\99$

Now to find the lower quartile, find the "median" of the data set that's to the left of 99:

$\{\overbrace{59,76,84,93,95,97}^{\textsf{to the left of the median}},101,101,102,102,104,106\}\\\\\{\overbrace{59,76,\boxed{84,93}95,97}^{\textsf{to the left of the median}},101,101,102,102,104,106\}\\\\\frac{84+93}{2}\\\\\frac{177}{2}\\\\88.5$

Now to find the upper quartile, it's the similar process as finding the lower quartile, except that you are finding the "median" of the data set to the right of 99:

$\{59,76,84,93,95,97,\overbrace{101,101,102,102,104,106}^{\textsf{to the right of the median}}\}\\\\\{59,76,84,93,95,97,\overbrace{101,101,\boxed{102,102} 104,106}^{\textsf{to the right of the median}}\}\\\\\frac{102+102}{2}\\\\\frac{204}{2}\\\\102$

Now that we have the upper and lower quartile, subtract them:

$102-88.5=13.5$

<u>In short, the IQR of this data set is 13.5.</u>

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3 years ago

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andrew11 [14]

Answer: A.

Step-by-step explanation:

To find mean, average the numbers in the data set by adding them together and dividing by the number of values.

(96 + 77 + 82 + 91 + 89) / 5 = 87.

To find median, take the "middle" value of the data set. To find this, you can sort the numbers in ascending order and remove the same amount of values from each side.

77 / 82 / 89 / 91 / 96, the median is 89.

Therefore, the mean is less than the median.

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3 years ago

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