Hey, just wanna know what the answer is because i don’t think mine is right!

Step-by-step explanation:

You are correct in starting with sin²Ф + cos²Ф = 1.

We are told that cos Ф = -8/17 and that the angle Ф is in Quadrant II.

We want to find sin Ф.  Solve sin²Ф + cos²Ф = 1 for sin²Ф:

sin²Ф = 1 - cos²Ф

          = 1 - (8)²/(-17)²  =  1 - 64/289  =  289/289 - 64/289 = 225/289

Taking the square root of this result, and remembering that Ф is in Quadrant II:

sin Ф = +√225/289 = +15/17

So your answer is just about right, except that you write "sin" without an argument (angle).

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.

my dear correct answer is option number 3