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3 years ago

Select the correct difference. -3z 5 - (-7z 5) -10z5 -4z5 4z5 4z

Mathematics

2 answers:

bezimeni [28]3 years ago

8 0

-10z5 is the answer.

Alinara [238K]3 years ago

3 0

<span>-10z5 is the answer. </span>

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Is -8-2(3+2n) +7 equivalent to -30-13n

JulsSmile [24]

Answer:

-8-2(3+2n) +7 = -4n-7

-30-13n=

7 0

3 years ago

Verify the identity. cot(x - pi/2) = -tan(x)

gizmo_the_mogwai [7]

Answer:

See below.

Step-by-step explanation:

$\cot(x-\frac{\pi}{2})=-\tan(x)$

Convert the cotangent to cosine over sine:

$\frac{\cos(x-\frac{\pi}{2} )}{\sin(x-\frac{\pi}{2})} =-\tan(x)$

Use the cofunction identities. The cofunction identities are:

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

To convert this, factor out a negative one from the cosine and sine.

$\frac{\cos(-(\frac{\pi}{2}-x ))}{\sin(-(\frac{\pi}{2}-x))} =-\tan(x)$

Recall that since cosine is an even function, we can remove the negative. Since sine is an odd function, we can move the negative outside:

$\frac{\cos((\frac{\pi}{2}-x ))}{-\sin((\frac{\pi}{2}-x))} =-\tan(x)\\-\frac{\sin(x)}{\cos(x)} =-\tan(x)\\-\tan(x)\stackrel{\checkmark}{=}-\tan(x)$

8 0

3 years ago

Irene is going to read a 216-page book. If she reads at a rate of 18 pages per day, how many days will it take her to read 1/3 o

Molodets [167]

It will take her 4 days to read 1/3 of the book.

The answer is 4.

3 0

4 years ago

Read 2 more answers

Loxlor<br><img src="https://tex.z-dn.net/?f=10%20%5Ctimes%2010" id="TexFormula1" title="10 \times 10" alt="10 \times 10" align="

Marina CMI [18]

Answer:

Step-by-step explanation:

10 in 10 places is 100. 10*1=10. 10*2=20..10*3=30.10*4=40,. 10*5=50,10*6=60,,,10*7=70,,. 10*8=80,. 10*9=90,. 10*10=100.

8 0

3 years ago

The equation y = 2.50x determines the total cost, y, of buying x carnival tickets. Use the drop-down menu to complete the senten

PIT_PIT [208]

Answer: The total cost of 15 carnival tickets=$37.50

Step-by-step explanation:

We are given that ,

The equation $y = 2.50x$ represents the total cost of buying buying carnival tickets , where x= Number of carnival tickets and y= Total cost.

To find : The cost of 15 carnival tickets.

In the given equation , we substitute the value of x = 15 we get

$y = 2.50(15)=2.50\times15=37.5\\\Rightarrow\ y=37.5$

Thus , According to the equation, the total cost of 15 carnival tickets= $ 37.50

Hence , the correct answer is $ 37.50 .

8 0

3 years ago

Read 2 more answers