Answer:
a = 1 and b = 2
Step-by-step explanation:
Using the Quotient Rule>
d/dx[(sin x)/(2+cos x) ]
= [(2 + cos x) * cosx - sin x * - sin x)] / (2 + cos x)^2
= 2cos x + cos^2x + sin ^2 x) / (2 + cos x)^2
But cos^2x + sin^2x = 1 so we have:
(1 + 2 cos x) / (2 + cos x)^2
- so a = 1 and b = 2.
Answer:
18/5
Step-by-step explanation:
5.4/12 = 1/8 is equivalent to (5.4)(1/12) = (z/8), or
(54/10)(1/12) = z/8.
The LCD is (10)(8)(12), or 120.
Mult. both sides by 120 yields 54 = 15z.
Dividing both sides by 15, we get z = 54/15 = 18/5 = z
Answer:
Step-by-step explanation:
A*5+b*2=145
a +b =50 | * -2
5a +2b=145
-2a -2b = -100
----------------------
5a-2a = 145-100
3a= 45
a=45:3
a=15 questions are worth 5 p
b=50-15=35 questions worth 2 p
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