2 years ago

Which ordered pair is the solution to the system of equations? {x+3y=−12 y=13x−6

Mathematics

1 answer:

Basile [38]2 years ago

3 0

Answer:

all work is shown and pictured

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Express 0.77230.77230, point, 7723 as a fraction

cricket20 [7]

Answer:

7723/10000

Step-by-step explanation:

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2 years ago

Find sin(a+B)

diamong [38]

Answer:

Cos A=5/13

we have

Cos² A= $1-Sin ²A$

25/169=1-Sin²A

sin²A=1-25/169

sin²A=144/169

Sin A= $\sqrt{144/169}=12/13$

again

Tan B=4/3

P/b=4/3

p=4

b=3

h= $\sqrt{3²+4²}=5$

Now

Sin B=p/h=4/5

in IV quadrant sin angle is negative so

Sin B=-4/5

CosB=b/h=3/5

Now

Sin(A+B):sinAcosB+CosAsinB

now 

substitute value

Sin(A+B):12/13*3/5+5/13*(-4/5)=36/65-4/13

=16/65 is a required answer

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