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3 years ago

9

Solve this inequality for x

1 answer:

r-ruslan [8.4K]3 years ago

4 0

x _> 65/3

hope that helps!

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What are all the exact solutions of square root 2 cosx-1=0 for 0 less than or equal to x less than or equal to 2 pi ?Give your a

Lera25 [3.4K]

Answer: $x=\frac{\pi}{4}\ or\ \frac{7\pi}{4}$

Step-by-step explanation:

Given equation is

$\sqrt{2}\cos x-1=0$

solving this

$\sqrt{2}\cos x=1\\\cos x=\frac{1}{\sqrt{2}}$

There can be two solution because $0$

$\cos x=\cos \frac{\pi }{4}\ or\ \cos (2\pi -\frac{\pi}{4})\\$

so, $x=\frac{\pi}{4}\ or\ \frac{7\pi}{4}$

3 0

3 years ago

For f(x)=2x+1 and g(x)=x^2-7, find (f-g)(x)

mrs_skeptik [129]

I hope this helps you

(f-g)(x)=2x+1-(x^2-7)

(f-g)(x)=2x+1-x^2+7

(f-g)(x)= -x^2+2x+8

5 0

4 years ago

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Given the system has no solution, find the value of a/b. Show your work.

Lana71 [14]

It’ll be C or B with no soul took by finding the value.

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3 years ago

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Simplify: 80 – 40 ÷ 4 · 5 + √25

velikii [3]

Answer: I got 35

…………………………

3 0

3 years ago

Please explain how to find the answer

irina1246 [14]

Answer:

$\rm x=\frac{46}{3}$

$\rm y=-\frac{25}{24}$

Step-by-step explanation:

$\huge\begin{array} {|c|} \hline\left. \begin{cases} { \rm\frac{ 1 }{ 4 } x+ \frac{ 4 }{ 5 } y = 3 } \\ { \rm\frac{ 5 }{ 16 } x- \frac{ 1 }{ 5 } y=5 } \end{cases} \right. \\ \hline \end{array}$

$\\ \Large \overline{ \rm - \: Steps \: using \: substitution \: - }$

$\rm \frac{1}{4}x+\frac{4}{5}y=3$

$\rm \frac{1}{4}x=-\frac{4}{5}y+3$

$\rm x=4\left(-\frac{4}{5}y+3\right)$

$\rm x=-\frac{16}{5}y+12$

┈

$\rm \frac{5}{16}\left(-\frac{16}{5}y+12\right)-\frac{1}{5}y=5$

$\rm -y+\frac{15}{4}-\frac{1}{5}y=5$

$\rm -\frac{6}{5}y+\frac{15}{4}=5$

$\rm -\frac{6}{5}y=\frac{5}{4}$

$\bold{ y=-\frac{25}{24}}$

┈

$\rm x=-\frac{16}{5}\left(-\frac{25}{24}\right)+12$

$\rm x=\frac{10}{3}+12$

$\bold{ x=\frac{46}{3}}$

7 0

3 years ago

Read 2 more answers