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luda_lava [24]
3 years ago
14

Which of the following is a solution to the system of linear equations below?

Mathematics
2 answers:
Inessa [10]3 years ago
6 0

Its C.

If we substitute x=2 and y=-5 into C we get

2(2) = 4 and 15-11 = 4

2(-5) = -10 and 6(2) - 22 = -10

Ronch [10]3 years ago
5 0

Hello!

First, let's solve the second equation for y.

2y=6x-22

Divide both sides by 2.

y=3x-11

Now we can plug this into the first equation to solve for x.

2x= -3(3x-11)-11

2x=-9x+33-11

2x=-9x+22

Subtract 9x from both sides.

-11x=22

Divide both sides by -11

x=-2

Now we plug this into the simplified version of the second equation.

y= 3(2)-11

y=6-11

y=-5

Therefore, our answer is D. (-2,-5)

I hope this helps!

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Step-by-step explanation:

First, convert all the secants and cosecants to cosine and sine, respectively. Recall that csc(x)=1/sin(x) and sec(x)=1/cos(x).

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For the second term:

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So, all together: (same denominator; combine terms)

\frac{1}{cos^2(x)}-\frac{sin^2(x)}{cos^2(x)}=\frac{1-sin^2(x)}{cos^2(x)}

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Everything simplifies to 1.

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