Student B is wrong , student A is correct in simplifying the expression .
Expression B must be simplified to cot θ .
Formulas to be used are :
1 - 
θ = 
θ
1 - 
θ = 
θ .
Since , location of error is step 3 , we will start from there
[ ( 1 - θ ) / sin θ ] / cos θ = [ ( 1 - θ ) / sin θ ] * [ 1 / cos θ ]
= ( 1 - θ ) / ( sin θ * cos θ )
= θ / ( sin θ * cos θ )
= cot θ .
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Since , the question is incomplete we assume it to be :
Nayeon and her aunt hiked 154 meters before they had lunch and after they had lunch, they hiked 84 more meters. all together they hiked 238 meters. The dad and sister hiked 167 meters before they had lunch and after they had lunch, they hiked 62 more meters. all together they hiked 329 meters. The difference in meters between Nayeon and her aunt and her dad and her sister (before lunch) is 13 meters.
Answer:
x=9
Step-by-step explanation:
Plug in 8 for f(x)
8=2x-10
Isolate the x term by moving the 10
18=2x
Isolate the variable
9=x
The formula is SA = bh + (s1 + s2 + s3)H
The answer is 420m^2
I hope this helps! :)
~Ayden
(3x+3) + (4x + 2)
------------------------- = 13
2
13(2) = (3x+3) + (4x+2)
26 = 3x + 3 + 4x + 2
26 = 7x + 5
26-5 = 7x
21 = 7x
x = 21 ÷ 7
x = 3
