The correct answer is -3. You just plug 7 into the equation and solve for y
Answer:
27.27%
Step-by-step explanation:
Given that,
Initial price = 11
Final price = 8
We need to find the percentage change in the price. It can be calculated as follows :
% = [(final-initial)/initial] × 100
So,

So, the percentage decrease is 27.27%.
Z - (-9) is the same as z + 9. Subtracting a negative is the same as adding.
Therefore
17 = z - (-9)
is the same as
17 = z + 9
To get 'z' all by itself, we need to subtract 9 from both sides. We subtract 9 from both sides to undo the "plus 9" occurring to the 'z' on the right side.
17 = z + 9
17-9 = z + 9=9 ... subtracting 9 from both sides
8 = z
z = 8
So the answer is z = 8
---------------------------
Check:
17 = z - (-9)
17 = 8 - (-9) ... replace z with 8
17 = 8 + 9
17 = 17
Answer checks out