A substance is followed by the symbol (1) in a chemical equation. What does the symbol represent?
1 answer:
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Answer:
x ≈ 36.9°
Step-by-step explanation:
Using the sine ratio in the right triangle, that is
sinx = =
, then
x = (
) ≈ 36.9° ( to 1 dec. place )
Other method:
zeros of numerator and denominator are x = -2 and x = 4.
Look at the second picture.
for x < -2 → x + 2 < 0 and x - 4 < 0
therefore
for -2 < x < 4 → x + 2 > 0 and x - 4 < 0
therefore
for x > 4 → x + 2 > 0 and x - 4 > 0
therefore
