Answer:
D) Multiplication property of equality; Commutative property of addition
Secx = 1/cosx
cot x = 1/tanx
1 + tan^2(x) = sec^2(x)
minus tan^2(x) on both sides,
1 = sec^2(x) - tan^2(x)
sec(x)/cos(x) - tan(x)/cot(x)
=1/cos^2(x) - tan^2(x)
= sec^2(x) - tan^2(x)
= 1
time taken to make bed = 15.75 hours
time taken to make a coffee table = 6.375 hours
time taken to make a dresser = 9.5 hours
Total time =
I think the answer varies, depending on how the question is worded.
Here's how I got it:
In PEMDAS, you must do the work in parenthesis first. 60 plus 7 is 67, and 4 times 67 is 268, so there are a variety of answers.
You could do 200 + (60+8), and the answer would be 268.
You could do 100 + (110+58), and the answer would be 268.
You could even do 1 + (200+{60 + [4+4] } ), and the answer would be 268.
It depends on what the answer choices are, really. If it isn't an answer choice question, you got three answers right off the bat.
The answer is 68 hope this helps