MATH HELP PLEASE

Mathematics

2 answers:

irakobra [83]3 years ago

7 0

Answer: 12.5%

Step-by-step explanation:

Given: A set of data representing the heights of 16 students, in centimeters, is shown in the histogram below.

Therefore, the total frequency of students = 16

From the histogram, the frequency of students having height between 160 and 169 cm=2

The percent of students are between the heights of 160 and 169 centimeters is given by :-

$P=\frac{\text{Frequency of students having height between 160 and 169 cm}}{\text{Total frequency}}\times100\\\\\Rightarrow\ P=\frac{2}{16}\times100\\\\\Rightarrow\ P=12.5\%$

Hence, the percent of students are between the heights of 160 and 169 centimeters = 12.5%

miv72 [106K]3 years ago

4 0

2/16=1/8 = 0.125 12.5%

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Belle bought 18 seeds in order to plant an herb garden for her grandma. Of the seeds she bought, 10 were parsley seeds.

Harrizon [31]

Answer:

0.3431

Step-by-step explanation:

Here, it can work well to consider the seeds from the group of 18 that are NOT selected to be part of the group of 15 that are planted.

There are 18C3 = 816 ways to choose 3 seeds from 18 NOT to plant.

We are interested in the number of ways exactly one of the 10 parsley seeds can be chosen NOT to plant. For each of the 10C1 = 10 ways we can ignore exactly 1 parsley seed, there are also 8C2 = 28 ways to ignore two non-parsley seeds from the 8 that are non-parsley seeds.

That is, there are 10×28 = 280 ways to choose to ignore 1 parsley seed and 2 non-parsley seeds.

So, the probability of interest is 280/816 ≈ 0.3431.

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The notation nCk is used to represent the expression n!/(k!(n-k)!), the number of ways k objects can be chosen from a group of n. It can be pronounced "n choose k".

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3 years ago

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Keith_Richards [23]

2.998 correct me if wrong

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3 years ago

PLS HELP ! Will give brainliest

Darina [25.2K]

Answer:

Step-by-step explanation:

The quadratic formula would be the following...

$x = \frac{-b (+-)\sqrt{b^{2} - 4ac } }{2a}$

where the original quadratic equation would be represented as follows

$ax^{2} + bx +c = 0$

Using this information and the information provided in the image we can plug in the quadratic equation values in the image to form the quadratic formula.

$\frac{-(-20)±\sqrt{(-20)^{2} - 4(16)(-6) } }{2(16)}$