Let

Then

and solving for x gives






By the quadratic formula,

but x must be a positive number, so only the positive square root solution is valid.

We identify a = c = 3 and b = 2, so a + b + c = 8.
Answer:
Its
Step-by-step explanation:
0.74=18 3/4=[b] 3.5 so you put them all together nd it comes out to
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[w]=1.2 bc its a different of the number
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4n - 7 = 13
4n = 20
n = 5. Hope it helps!