<span>sin(3x)cos (4x)+cos(3x)sin(4x)=-0.9
Then sin(3x+4x) = 0.9
sin(7x) = 0,9
Arcsin(,9) = 64.158 degrees or 115.842
x = 9.165 and 16.549
</span>
-3x = 4y is the answer
Because:
-3 (-4) = 4 (-3)
-7 = -12
Answer:
18
Step-by-step explanation:

2,3,6,7 are equal
2 and 3 are equal bc vertical angles
6 and 3 are alternate angles
6 is 7's vertical angle
Answer:
y = -x + 5
Step-by-step explanation:
y sub 2 - y sub 1/ x sub 2 - x sub 1