Answer:
10%
Step-by-step explanation:
divide 90 into 81
so 81/90=.9
multiply that by 100 and you get 90 so 81 is 90% of 90 so it got marked down 10%
The first thing to do with these problems is to convert them into y=mx+b form; this will literally show you the answer to slope and y intercept since m=slope and b=y intercept.
To convert, isolate the y and the rest should fall into place. Subtract 2x from 4y and the other side of the equation to get the equation 4y= -2x+9 (put the x first because of mx+b). Then Divide the 4 from y and do the same to the other side to get y= -1/2x+9/4. M= -1/2 so that is the slope. B=9/4 so that is the y intercept
The answer to the question is
The answer is -5 hope this works
