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Korvikt [17]
3 years ago
5

8p+5=-6p+1 what's the answer to this equation?​

Mathematics
1 answer:
Olin [163]3 years ago
8 0

Answer:

-2/7

Step-by-step explanation:

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Pleasee help mee<br><br>12sin(x)-5cos(x)=6,5​
abruzzese [7]

We turn -5,12 into polar coordinates.  It's a Pythagorean Triple so

r = 13   Ф=arctan(-12/5) + 180°   ( in the second quadrant )

so -5 = 13 cos Ф, 12 = 13 sin Ф

12 sin x - 5 cos x = 6.5

13 sinФ sin x + 13 cos Ф cos x = 6.5  

13 cos(x - Ф) = 6.5

cos(x - Ф) = 1/2

cos(x - Ф) = cos 60°

x - Ф = ± 60° + 360° k     integer k

x = Ф ± 60° + 360° k  

x = 180° + arctan(-12/5) ± 60° + 360° k  

That's the exact answer;

x ≈  180° - 67.38° ± 60° + 360° k  

x ≈  122.62° ± 60° + 360° k  

x ≈  { 62.62°, 182.62°} + 360° k,  integer k

3 0
3 years ago
Find the fractional notation for the ratio 5 to 9
vazorg [7]
5:9 is just 5/9
Hope this helps!
5 0
3 years ago
4.
valentinak56 [21]

Answer:

A

Step-by-step explanation:

<u>Slope- intercept </u><u>form</u>

y= mx +c, where m is the slope and c is the y-intercept.

The given equation is in the slope-intercept form and hence we can easily identify its slope by looking at the coefficient of x.

y= 2x +7

slope= 2

Parallel lines have the same slope, thus the slope of the parallel line is also 2.

Substitute m= 2 into the general equation:

y= 2x +c

Substitute a pair of coordinates into the equation to find the value of c:

When x= 3, y= 11,

11= 2(3) +c

11= 6 +c

c= 11 -6

c= 5

Therefore the equation of the line is y= 2x +5.

6 0
2 years ago
Read 2 more answers
I need the answer <br> Please
Andre45 [30]
If each inch is 40 miles then 7(40) = 280 and add the 1/4 which is 10 so the answer is 290
4 0
3 years ago
Sonji paid $25 for two scarves, which were different prices. When she got home she could not find the receipt. She remembered th
ollegr [7]

Answer:

11$

Step-by-step explanation:

big brain

6 0
3 years ago
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