Step-by-step explanation:
(72)¹⁴³ ≡ x (mod 7)
Since 72 ≡ 2 (mod 7),
72³ ≡ 2³ (mod 7) ≡ 1 (mod 7).
Therefore (72)¹⁴³ = (72³)⁴⁷ * (72²)
≡ 1⁴⁷ * 4 (mod 7) ≡ 4 (mod 7).
The answer is A.
Distribute. -18 + 9i + 18i -9i^2. as i^2 = -1, the equation can be simplified to -9 + 27i as the final answer.
Answer: B
6x^4+5x^3-9x^2+2x
Answer:
Step-by-step explanation:
Divide both sides by c
s/c = c*(h + r)/c
s/c = h + r
Subtract h from both sides
s/c - h = h-h+r
s/c - h = r
