Step-by-step explanation: We need to decrease $8a by 60 percent because $8a is the price after a 60% increase. 8 x 6/10 is 48/10 which as a mixed number is 4 8/10 or 4.8. Now, we subtract 4.8 from 8 which yields our answer of 3.2.
the equation for the slope is mx+b=y so 6x+5y=11 is the same as 5y=11-6x and that is the same as y=11/5-6/5x. we know the slope is -6/5 and so the y intercept of the line is -7+(-6/5)=-8.2. then the answer is y=-1.2x-8.2