joseenrique02
27.10.2020 •
Mathematics
(Help) Make a conjecture about what the next item in each sequence will be. -2, 1, -0.5, 0.25, -0.125,...
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Ответ:
B. x=y
Step-by-step explanation:
A 5% tax charge is equivalent to multiply the current price by 1.05. On the other hand, a 5% discount is equivalent to substrace the current the 5% of it, so in the end, you multiply the current price by 0.95.
For X we should multiply first by 0.95, then by 1.05
For Y we multiply first by 1.05, then by 0.95
Hence, if L = price list, we have
x = L*0.95*1.05 = 0.9975Ly = L*1.05*0.95 = 0.9975Lz = LAs a result, x=y<z. Option B is correct.
Note that applying discount first or charging taxes first doesnt matter because the order of the factors doesnt ater the product.