The Answer is 3
All you need to do is multiply 7 and 1 then divide.
Answer:
(0, -2), (1, -1), (2,0)
Step-by-step explanation:
should be along those lines
30% of 42 is 12.6$.
42-12.6 = 29.4$ is the price of the pair with discount applied.
Tax 7%
29.4 * 7% = 2.06
29.4$ + 2.06$ = 31.46 $ final price with discount and tax applied.