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statuscvo [17]
3 years ago
6

I don’t understand this

Mathematics
1 answer:
mylen [45]3 years ago
7 0
To solve for an unknown number, you have to keep isolating it till it is all alone:
A=P(1+rt)
(1+rt)=A/P
rt=A/P -1
r=(A/P-1)/t
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Please help me I just don't understand!!!!!!!!!!!!!
Marina86 [1]

Answer:

240pi

Step-by-step explanation:

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there is this really annoying girl next tom= me and i want to bachhand her in the face SOMEONE PLEASE HELP ME I NEED TO NOT HIT
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4 years ago
Karen surveyed students in one middle school about their favorite band. Of the 1,156 students in the middle school, 65 sixth-gra
ValentinkaMS [17]
I believe the answer is B.



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3 0
2 years ago
I don’t understand.
Tomtit [17]

Answer:

y = -2/3x

Step-by-step explanation:

A perpendicular line is the negative reverse of the slope of the other line. I'm not sure about the options you have there but hopefully this helps you get your answer.

8 0
3 years ago
Solve this equation using sum to product formulas: cos3x + sin2x - sin6x + cos5x = 0
Softa [21]
<h2><u>Answer:</u></h2>

x=(nπ/2)±15

x=(2nπ+90)/3

x=90-2nπ

<h2><u>Steps:</u></h2>

cos3x+sin2x-sin6x+cos5x=0

(cos3x+cos5x)+(sin2x-sin6x)=0

equation(1)

<u>Use formula:</u>

\cos(c)  +  \cos(d)  = 2 \cos( \frac{c + d}{2} ) . \cos( \frac{c - d}{2} )

\sin(c)  -  \sin(d)  = 2  \cos( \frac{c + d}{2} ) . \sin( \frac{c - d}{2} )

<u>So in equation (1),if c=3x ,d=5x,C=2x,D=6x</u>

》2cos{(c+d)/2}.cos{(c-d)/2}+2cos{(C+D)/2}.sin{(C-D)/2}=0

》2cos{(3x+5x)/2}.cos{(3x-5x)/2}+2cos{(2x+6x)/2}.sin{(2x-6x)/2}=0

》2cos(4x).cos(-x)+2cos(4x).sin(-2x)=0

》2cos(4x)[cos(-x)+sin(-2x)]=0

》2cos(4x)[cos(x)-sin(2x)]=0

<u>1)</u><u> </u><u>Either:</u>

2cos(4x)=0

cos(4x)=0/2

cos(4x)=0

cos(4x)=cos(90)

General solution for such case is:X=2n±a

So,

4x=2nπ±90

x=(2nπ±90)/4

x=(nπ/2)±15

<u>2) Or:</u>

cos(x)-sin(2x)=0

cos(x)=sin(2x)

General solution for such case is:X=2n±a

So,

x=2nπ±(90-2x)

x=2nπ±90±2x

x±2x=2nπ±90

<u>Take +ve sign,</u>

x+2x=2nπ+90

3x=2nπ+90

x=(2nπ+90)/3

<u>Take -ve sign,</u>

x-2x=2nπ-90

-x=2nπ-90

x=(2nπ-90)/(-1)

x=90-2nπ

4 0
3 years ago
Read 2 more answers
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