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Aleksandr-060686 [28]
3 years ago
13

7% of 120 (Need work shown)

Mathematics
2 answers:
MissTica3 years ago
6 0

120=100%

x= 7 %

cross-multiply

100x= 120*7

100x= 840

x= 840/100

x= 42/5

x= 8.4

Therefore 7% of 120 is 8.4


I hope that's help !


inessss [21]3 years ago
3 0
1% of 120 is 1.2, so 7 *1.2 = 8.4

Also you could set up the proportion 7/100 = x/120 and solve for x.
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If point \left(x,\ \frac{\sqrt{7}}{3}\right) is on the unit ircle, then:

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Since, the point is in the second quadrant, x is negative.

Thus, (x,\ y)=\left(x,\ \frac{\sqrt{7}}{3}\right)=\left(-\frac{ \sqrt{2} }{3},\ \frac{\sqrt{7}}{3}\right)

Part A:

3 \sqrt{7} =6\left( \frac{ \sqrt{7} }{2} \right) \\  \\ =6\left( \frac{ \sqrt{7} }{3} \cdot \frac{3}{ \sqrt{2} } \right) \\  \\ =6\left( \frac{ \frac{ \sqrt{7} }{3} }{ \frac{ \sqrt{2} }{3} } \right)=-6\left( \frac{ \frac{ \sqrt{7} }{3} }{ -\frac{ \sqrt{2} }{3} } \right) \\  \\ =-6\left( \frac{y}{x} \right)=-6\tan\theta

Therefore, -6\tan\theta=3\sqrt{7}.



Part B:

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Therefore, \tan\theta=- \frac{ \sqrt{7} }{2}
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H.C.F of 18,9,45 = 9

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