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3 years ago

10

Emily created the net worth statement shown.

1 answer:

postnew [5]3 years ago

6 0

D hopefully this have helped you !

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True or false (Picture provided)

Naya [18.7K]

<h2>Hello!</h2>

The answer is: True.

<h2>Why?</h2>

A counterexample is a way that we can prove that something is not true about a mathematical equation or expression, it's also considered as an exception to a rule.

So:

$sec^{2}x-1=\frac{cosx}{cscx}\\\\tg^{2}x=\frac{cosx}{\frac{1}{sinx}}\\\\\frac{1-cos2x}{1+cos2x}=cosxsinx$

Then, evaluating we have:

$\frac{1-cos(2*45)}{1+cos(2*45)}=cos(45)*sin(45)\\\\\frac{1-0}{1+0}=\frac{\sqrt{2} }{2}*\frac{\sqrt{2}}{2}\\\\1=\frac{(\sqrt{2})^{2} }{4}\\\\1=\frac{2}{4}\\\\1=\frac{1}{2}$

Hence, we can see that the equation is not fulfilled, so, 45° is a counterexample for $sec^{2}x-1=\frac{cosx}{cscx}$ and the answer is true.

Have a nice day!

3 0

3 years ago

20 % of 2 is equal to<br> A. 20<br> B. 4<br> C. 0.4<br> D. 0.04

zubka84 [21]

Answer: 0.4

Step-by-step explanation: To find 20% of 2, first write 20% as a decimal by moving the decimal point two places to the left to get .20.

Next, the word "of" tells us to multiply so we multiply .20 by 2.

(.20) (2) = 0.4

Therefore, 0.4 is 20% of 40.

3 0

3 years ago

Exercise 1.7.1.

Korvikt [17]

thiz language is french

3 0

3 years ago

A certain car in Canada can travel 15 kilometers per 1 liter of gasoline. How many miles per gallon is this?

wolverine [178]

Answer:

15km x 1 mile/.621 km = 9.315 mi

1L = .264 gallons

So 9.315mi / .264 gal = 35.28 mi/gal

Step-by-step explanation:

thanks

3 0

3 years ago

Yvonne closes her eyes and picks a candy from the bag,

Sonja [21]

Okay? We are going to need more information that that.

8 0

3 years ago