Answer:
2
Step-by-step explanation:
-(-1) + (-7) + (2) - (-4) - (-2) =
= 1 + (-7) + 2 + 4 + 2
= -6 + 2 + 4 + 2
= -4 + 4 + 2
= 0 + 2
= 2
Answer:
A: 6, 12, 18, 24, 30
10, 20, 30, 40
B: 30
C: 5/6= 25/30 and 7/10= 21/30
D: 25/30>21/30 so 5/6>7/10
The cofunction of cos is sin(90-x)
90 degrees is equal to PI/2
The cofunction becomes sin(PI/2 - 2PI/9)
Rewrite both fractions to have a common denominator:
PI/2 = 9PI/18
2PI/9 = 4PI/18
Now you have sin(9PI/18 - 4PI/18)
Simplify:
Sin(5PI/18)
It's the smallest value in this equation which should at x=-10, the equation is x=-b/(2a)