Answer:
Step-by-step explanation:
We are to show that 
<u>Proof:</u>
From trigonometry identity;


From trigonometry, 2sinAcosA = Sin2A

Also note that sin(B-C) = sinBcosC - cosBsinC
sin420cos140 - cos420sin140 = sin(420-140)
The resulting equation becomes;

= 
Answer:
a. 7/8
Because 7/8 is 7 divided by 8
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Answer:
The answer is $350
Step-by-step explanation:
00 = 8 hours
28/8 = 3.5
3.5(100) = 350
The worker would earn $350 in 28 hours
Answer:
8 for 2.56
Step-by-step explanation:
THE ANSWER IS IN CENTS.
2.56 ÷ 8 = 0.32 per ear
4.23 ÷ 12 = 0.36 per ear