Please help me pls 7tyh grade math

What is the length of YZ?

Bogdan [553]

Answer: C

Hello,

Step-by-step explanation:

WZ=7-3=4

YW²=XW*WZ=3*4=12 ==> WY=2√3

In the right triangle YWZ, using the Pythagorean's theorem:

YZ²=WY²+WZ²=12+4²=28

YZ=2√7≅5.29150....

Answer C

3 0

2 years ago

Use the graphing tool to create a histogram of Gretchen’s data. Use eight bins for your histogram.

lozanna [386]

The number of bins in the histogram determines the width of the bins and

the frequency (number of members) in a bin.

Please find attached the graph of the histogram of Gretchen's data created with MS Excel.

<h3 /><h3>Method used to create the histogram of Gretchen's data</h3>

Given:

The table from Gretchen's data is presented as follows;

$\begin{tabular}{|c|c|} \underline{ Member}& \underline{Number of Days}\\x_1&2\\x_2&4\\x_3&7\\x_4&8\\x_5&12\\x_6&15\\x_7&10\\x_8&7\\x_9&9\\x_{10}&6\\x_{11}&13\\x_{12}&3\\x_{13}&8\\x_{14}&10\\x_{15}&10\end{array}\right]$

The required number of bins = 8 bins

The steps to create the histogram using MS Excel;

Enter the 15 dataset for the number of days as presented in the above table in a column on the worksheet.

Select the dataset entered into the cells from above then select the Insert menu.

In the Chart section of the insert menu click on the Histogram icon to view the quick options for histograms type charts.

Select the Histogram option from the drop down menu from the quick options for histograms, to create an histogram chart.

Right-click the histogram created from the previous step, then select Format Chart Area from the pop up menu.

In the Format Chart Area task pane, click on the arrow next to Chart Options, then select Horizontal Axis from the options menu.

Click on the histogram icon under Axis Options, then click on arrow button besides Axis Option sub menu, to display the axis options.

Click on the Number of bins radio button then enter 8, to create an histogram having 8 bins.

The histogram of Gretchen's data having eight bins created with MS Excel is attached.

Learn more about creating a histogram chart here:

brainly.com/question/25069221

brainly.com/question/4601962

5 0

2 years ago

What is the length of the altitude of the equilateral triangle below?

Mazyrski [523]

ANSWER

The length of the altitude is $3\sqrt{3}$ units

<u>EXPLANATION</u>

The altitude of a triangle is the vertical height of the triangle.

From the diagram the altitude is $a$

Method 1: We can use Pythagoras theorem to find $a$

$6^2=a^2+3^2$

$6^2-3^2=a^2$

$36-9=a^2$

$27=a^2$

We take the square root of both sides,

$\sqrt{27}=a$

$\sqrt{9\times3}=a$

$\sqrt{9} \times \sqrt{3}=a$

$3\sqrt{3}=a$

Method 2 Using Trigonometry

$sin(60\degree)=\frac{a}{6}$

$6sin(60\degree)=a$

$a=6\times \frac{\sqrt{3}} {2}$

$a=3\sqrt{3}$

6 0

3 years ago

Read 2 more answers

Someone please help with this,I’m no expert at doing annotated bibliography I will give Brainliest to whoever helps me out(:

Nitella [24]

An annotated bibliography includes the citation and a brief description of the source.

The citation can be made by plugging in information in an online citation website.

The description is 2 to 3 sentences about what type of source (primary or secondary) and how you used it (for the images, background info, etc).

5 0

2 years ago

How do I solve part b?

Minchanka [31]

Answer:

$x \approx 1.4$

Step-by-step explanation:

This problem gives one the following equation to model the graph of a line: ( $y=x^2-2$ ). The problem asks one to find the value of (x) when (y=0). Rather than using the graph, an easier way to solve this problem is to substitute (0) in for the value of (y) and then solve for (x) using inverse operations.

$y=x^2-2\\$

Substitute,

$0=x^2-2$

Inverse operations,

$0=x^2-2\\\\2=x^2\\\\\sqrt{2}=x$

Round:

$x \approx 1.4$

As one can see on the graph, this result is very close to the value at which the graph intersects the (x) axis. Thus, one can conclude that (x) does indeed approximately equal (1.4)

6 0

2 years ago