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Mariulka [41]
2 years ago
9

Verify that each equation is an identity. Show Work plzzz!!!

Mathematics
1 answer:
Morgarella [4.7K]2 years ago
3 0

sin^2(x)[csc^2(x)+sec^2(x)]=sec^2(x) \\\\[-0.35em] ~\dotfill\\\\ sin^2(x)[csc^2(x)+sec^2(x)]\implies sin^2(x)\left[\cfrac{1}{sin^2(x)}+\cfrac{1}{cos^2(x)} \right] \\\\\\ ~~\begin{matrix} sin^2(x) \\[-0.7em]\cline{1-1}\\[-5pt]\end{matrix}~~ \left[\cfrac{cos^2(x)+sin^2(x)}{~~\begin{matrix} sin^2(x) \\[-0.7em]\cline{1-1}\\[-5pt]\end{matrix}~~ cos^2(x)} \right]\implies \cfrac{1}{cos^2(x)}\implies sec^2(x)

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The selling price of a refrigerator, is $739.20. If the mark up is 20% of the dealers cost , what is the dealers cost of the ref
Lisa [10]

Mark up percentages are used to increase the prices of items

The dealers cost of the refrigerator is $591.36

<h3>How to determine the dealer cost</h3>

Represent the dealer cost of the refrigerator with x.

Given that the markup is 20% and the selling price of the refrigerator is $739.20, then we have the following equation

x = 739.20 * (1 - 20%)

Evaluate the product

x = 591.36

Hence, the dealers cost of the refrigerator is $591.36

Read more about mark ups at:

brainly.com/question/19104371

5 0
2 years ago
Please plot this linear equation on a graph, and also explain how to plot it. <br> <img src="https://tex.z-dn.net/?f=y%3D3x-7" i
olasank [31]

Answer:

See below:

Step-by-step explanation:

Hello! I hope you are having a nice day.

We can solve this equation in a single step, we just need a bit of theory and a graph.

We can first see that its in y=mx+b form. Which is also known as Slope-Intercept form.

This means that we know the following.

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Since we know that, we can see that from our equation that the slope of the line is 3 and the y intercept is (0,-7).

Now that we've gotten that, we can start graphing.

The y intercept is -7 so we can plot (0,-7) as one of our points.

The slope of 3 means that we got up 3 units then right a single unit.

Therefore, another point could be (1,-4).

With our two points, we can create our graph by creating a straight line through those two points and therefore plotting our line.

Cheers!

6 0
2 years ago
Read 2 more answers
there are 124 students in the band. there are 12 more boys than girls in the band. how many boys and how many girls are in the b
kvv77 [185]
B = g + 12
g + b = 124
Replace the b in the second equation with
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2g + 12 = 124
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g = 56

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3 years ago
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3 years ago
PLEASE HELP I WILL GIVE BRAINLEST
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The answer is : <span>It is 6% higher than the theoretical probability.</span>
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