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Mandarinka [93]

2 years ago

12

Abby Matthew, store manager for Sears, does not know how to price

1 answer:

Nataly_w [17]2 years ago

6 0

$480 since the question is just is how much would the would price be after the discount (discount)

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Solve sin^4(x)+cos^4(x)=cos4x

ICE Princess25 [194]

$\sin^4x=(\sin^2x)^2=\left(\dfrac{1-\cos2x}2\right)^2=\dfrac{1-2\cos2x+\cos^22x}4$
$\cos^4x=(\cos^2x)^2=\left(\dfrac{1+\cos2x}2\right)^2=\dfrac{1+2\cos2x+\cos^22x}4$

$\implies \sin^4x+\cos^4x=\dfrac{2+2\cos^22x}4=\dfrac{1+\cos^22x}2$

$\cos^22x=\dfrac{1+\cos4x}2$
$\implies\sin^4x+\cos^4x=\dfrac{1+\frac{1+\cos4x}2}2=\dfrac{3+\cos4x}4$

So the equation reduces to

$\dfrac{3+\cos4x}4=\cos4x$
$\dfrac34=\dfrac34\cos4x$
$\cos4x=1$

We have $\cos\theta=1$ whenever $\theta=0+2k\pi=2k\pi$ , where $k$ is any integer. This means for this equation we have solutions at

$4x=2k\pi\implies x=\dfrac{k\pi}2$

6 0

4 years ago

Help me is due today. I will give brainliest if you answer first and if it is correct;)

AleksandrR [38]

Answer:

<h2><em><u>a) is correct</u></em></h2>

3n + 5

1. Substitute the numbers

3(5) + 5 = 15 + 5 = <em><u>20</u></em>

2. Substitute the second number

3(6) + 5 = 18 + 5 = <em><u>23</u></em>

<h2><u><em>b) Numbers are 8 and 16.</em></u></h2>

This is because I realized I got the number of 4 last because I did 1*2 = 2.

Then I did 2*2 = 4.

So you have to multiply by two to get the next number. Or you can put it to the 4th or 5th exponent of 2.

1. 1

2. 1*2 = 2

3. 2*2 = 4

<h2><em><u>4. 4*2 = 8</u></em></h2><h2><em><u>5. 8*2 = 16</u></em></h2>

5 0

4 years ago

What is 275 divided by 38

Triss [41]

Answer:

The answer is 7.2368421053 .

6 0

3 years ago

Read 2 more answers

Solve each inequality and graph its solution. Can you guys solve all three please. This is do soon so please help!

mart [117]

<h2>Hi ☘</h2>

1-A 2-A 3-B

$- 104 \geqslant - 8b - 8$

put -8 near -104

$- 104 + 8 \geqslant - 8b$

$- 96 \geqslant - 8b$

b will be alone.

$\frac{ - 96}{ - 8} \geqslant \frac{ - 8b}{ - 8}$

$b \geqslant 12$

Answer A

$3m - 7 > - 4$

$3m > - 4 + 7$

$3m > 3$

$\frac{3m}{3} > \frac{3}{3}$

$m > 1$

Answer A

İf

$m \geqslant 1$

The answer would be D

But answer A

$- 4x + 4 > - 16$

$16 + 4 > + 4x$

$20 > 4x$

$\frac{20}{4} > \frac{4x}{4}$

$x < 5$

Answer B

<em><u>We</u></em><em><u> </u></em><em><u>learnt this</u></em><em><u> </u></em><em><u>way in Turkey</u></em><em><u>.</u></em>

3 0

3 years ago

A cylinder and it’s dimensions are shown

rewona [7]

Answer:

I believe it is D

Step-by-step explanation:

3 0

3 years ago