Answer:
x = -4, y = -6
Step-by-step explanation:
-x+2y = -8
3x-y = -6
x = 2y+8
3(2y+8) - y = -6
6y + 24 -y = -6
5y = -30
y = -6
x = 2(-6)+8 = -12+8 = -4
x = -4, y = -6
9514 1404 393
Answer:
-2cos²(x) +3cos(x) -1
Step-by-step explanation:
Use the "Pythagorean identity" to replace sin²(x).
sin²(x) +cos²(x) = 1
Then ...
2sin²(x) +3cos(x) -3 = 2(1 -cos²(x)) +3cos(x) -3
= -2cos²(x) +3cos(x) -1
Answer:
x=30
Step-by-step explanation:
you distribute the negative to 2x and 19
3x+4-2x-19=15
then you combine like terms
x-15=15
you add 15 to both sides
x=30
