<span>f(x) = 2x + 3
</span><span>g(x) = x²-7
</span>(f+g)(x) = f(x) + g(x) = 2x + 3 + x² - 7 = x² + 2x - 4
(f+g)(x) = x² + 2x - 4
B + f = 8
where b is the current bus fare and f the current ferry fare.
1.10b + 1.25f= 9.25. Replace f with 8- b:
1.10b + 1.25(8-b) = 9.25
Then:
1.10b-1.25b + 10 = 9.25, and so
-0.15b = -0.75. Then b = -0.75 / (-0.15) = 5
The bus fare is current $5, and so the ferry fare is $3.
I agree, the only 2 that look the most similar is B. and D.
Answer
b=-8
Step-by-step explanation:
b-4=-12
+4 +4
b=-8 =)