Answer:
b
Step-by-step explanation:
(2a + ★)(2a - ★) =4a²-b²
If you substitute b for ★ in the equation. We have;
(2a + b)(2a - b) = 4a² - b²
4a² - 2ab + 2ab -b² = 4a²-b²
4a²-b²= 4a² - b².
So 'b' is correct
It would depend on what someone would be repairing wether it be a computer repair, car repair, plumbing etc.
regardless 9 hours is a very long time so i would not expect it to be too cheap.
hope this helps
áreaBCDE = 128 cm² => BC = 8√2 cm
BC = AB√2 =>
8√2 = AB√2 =>
AB = 8 cm
The answer is 1/2 because the 1 and 3 = 4 and -5 + -3 = -8 and that is 4/8 which = 1/2
