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4 years ago

Plz help me someone!

Mathematics

2 answers:

Rainbow [258]4 years ago

8 0

Answer:

Step-by-step explanation:

The answer is b and d

adoni [48]4 years ago

4 0

Answer:

m+5nx(9-p)-6-2r

Step-by-step explanation:

here you go

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Precalculus PLEASE HELP ME right answers only check all please

Alex_Xolod [135]

Given :

$cos(x)cos(\frac{\pi }{7}) + sin(x)sin(\frac{\pi }{7})=-\frac{\sqrt{2}}{2}$

We know the identity

$cos(x)cos(y) + sin(x)sin(y)=cos(x-y)$

We use this property to simplify the left hand side

So $cos(x)cos(\frac{\pi }{7}) + sin(x)sin(\frac{\pi }{7})=cos(x - \frac{\pi }{7})$

$cos(x - \frac{\pi }{7}) =-\frac{\sqrt{2}}{2})$

we know ,

when $cos(x) =-\frac{\sqrt{2}}{2})$ then

$x = \frac{3\pi }{4} , \frac{5\pi }{4}$

For $cos(x - \frac{\pi }{7}) =-\frac{\sqrt{2}}{2})$

$x - \frac{\pi }{7}= \frac{3\pi }{4} and x - \frac{\pi }{7}= \frac{5\pi }{4}$

Add $\frac{\pi }{7}$ on both sides

$x= \frac{3\pi }{4} + \frac{\pi }{7} and x= \frac{5\pi }{4} +\frac{\pi }{7}$

Finally we add 2npi for general solution

So options C and D are correct

6 0

3 years ago

Is the following relation a function?

igomit [66]

I believe it is a function

4 0

4 years ago

Anja collected data about the number of dogs 9th-grade students own. She created this histogram to represent the data and determ

igomit [66]

Anja is correct that the histogram is skewed to the right

According to the statement

we have given that the anja collected the data and created the histogram and after analyzing we have to tell that her claim is correct or not.

So, she collected the data:

A graph shows number of dogs labeled 0 to 2 on the horizontal axis and frequency on the vertical axis. 0 dogs at frequency 20. 1 dog at frequency 15. 2 dogs at frequency 12.

we know that the

Histogram is is an approximate representation of the distribution of numerical data.

and after making the histogram we see that

The histogram is skewed to the right because there is less data on the right side.

So, Anja is correct that the histogram is skewed to the right.

Learn more about Histogram here brainly.com/question/25983327

#SPJ1

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2 years ago

Fill in the missing notations

rewona [7]

The answer is:
60%=0.6=3/5
0.23<24%<1/4
37.6%>3/8>0.27

5 0

4 years ago

Which graph represent an exponential function

miskamm [114]

Answer:

The one you slelcted represents y= 1/2 to the power of x

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2 years ago