Answer:
by substituting the values we get
51÷(15+2)
51÷17=3
hope it helps you mate
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The laundry one is C
The ladder one is B.
I don't get what you are asking, please elaborate?
1. 3y
multiplying 3 and y together gets 3y
2. y-5
5 less implies that we subtract 5 from y
3. y+7
adding 7 to y, self-explanatory
4. 9y
same thing as #1
5. 
quotient of implies division, since number y is listed first, y is the numerator
A) 1/3 B) 2/3 C) what is it asking D) 1/3 E1/3