3 years ago

125 invitations to 75 Invitations ( Round To The Nearest Tenth Of A Percent If Necessary )

Mathematics

1 answer:

aleksklad [387]3 years ago

8 0

I think the answer to this is .6 or 1.7

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At noon, the minute and hour hands overlap. In how many hours will they overlap again?

nadya68 [22]

24 hours

Because 24 hours equals 1 day or one rotation of the clock

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3 years ago

If 78 sit-ups is done in 2 minutes how many can be done in 5 minutes

Oksanka [162]

Answer:

195

Step-by-step explanation:

78/2*5

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3 years ago

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Triangle BAC was rotated 90° clockwise and dilated at a scale factor of 2 from the origin to create triangle XYZ. Based on these

ololo11 [35]

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Step-by-step explanation:

8 0

3 years ago

Find the exact value of tan(x-y) if sin x=8/17 cosy = 3/5

jolli1 [7]

To solve the the question we proceed as follows:

From trigonometric laws

$(cos x)^2+(sin x)^2=1$

$sin (x-y)=sin$ $x$ $sin$ $y-sin$ $y$ $cos$ $x$

$cos (x-y)=cos$ $x$ $cos$ $y+sin$ $x$ $xin$ $y$

si $x=\frac{8}{17}$

$cos$ $x=sqrt(1-(sin x)^2)=sqrt(1-64/289)=sqrt(\frac{225}{289} )=\frac{15}{17}$

$cos$ $y=\frac{3}{5}$

$sin$ $x= sqrt(1- (cos x)^2)= sqrt(1-\frac{9}{25} )=sqrt(\frac{16}{25} )=\frac{4}{5}$

thus

$tan (x-y)=[sin (x-y)]/[cos (x-y)]$

=[sin x cos y-sin y cos x]/[cos x cos y+sin x sin y]

plugging in the values we obtain:

$[8/17 *3/5-4/5*15/7]/[15/17*3/5+8/17*4/5]$

simplifying

$[24/85-60/85]/[45/85+32/85]$

$=-\frac{36}{77}$

6 0

2 years ago