Answer:
The US civil rights movement gain new momentum after World War II as the rallying of blacks in Montgomery and Alabama by Rosa Parks. At the time black people were separated from white people. Whites were considered as a superior and high class while on the other side blacks were counted as a lower class.
This answer is A. 19.5/3.25=6
Let x, y, z ∈ C, the set of complex numbers.
By definition of ○,
(x ○ y) ○ z = (x + y - 2i) ○ z
… = (x + y - 2i) + z - 2i
… = x + y + z - 4i
and
x ○ (y ○ z) = x ○ (y + z - 2i)
… = x + (y + z - 2i) - 2i
… = x + y + z - 4i
so (x ○ y) ○ z = x ○ (y ○ z), which means ○ is indeed associative under C.
Answer: 150+475= Price before sale.
Step-by-step explanation:
Isolate x in 2nd equation...
-x - 2y = -10 ....add 2y to both sides
-x = 2y - 10 ...multiply by -1 to make x positive
x = -2y + 10 <== u would sub in -2y + 10 in for x in the 1st equation
