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sqrt(650)

Step-by-step explanation:

sin 45 = 5sqrt(13)/y

y = 5sqrt(13)*2/sqrt(2) = 10sqrt(13)/sqrt(2) = sqrt(650)

To eliminate a variable in the system, we will have to subtract both expressions from each other

Step-by-step explanation:

Given the equations

5x+8y=-1

5x -8y=-7

To eliminate a variable in the system, we will have to subtract both expressions from each other

5x - 5x +8y-(-8y) = 1-(-7)

0 + 16y = 8

16y = 8

You can see that the variable x has been eliminated by simply subtracting both equations

y = 8/16

y = 1/2