Simplify (4m^2n-4mn+5)-(7m^2-3mn-2)+(9m^2n-2mn-1)
1 answer:
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Answer:
$519.61
Step-by-step explanation:
We add the 8% tax 23 days of subscription since prorated for 7 days [30 - 7 = 23].
How much is 23 days subscription if 30 days is 499?
We add 8% of this to 499:
0.08 * 382.57 =30.51
So cost is:
499 + 30.61 = 529.61
Now we have $10 off, so final cost would be:
529.61 - 10 = $519.61
Answer:
1a: +
=
1b: See below
1c: inches between the beetle and ant
Step-by-step explanation:
1a. To build the equation, we need to see that the beetle started at 3/4th inches below ground level, then "climbed" (which is poor English, it should be descended) a certain distance, and then it ended up at 2 1/2 inches below ground. The distance "climbed" can be represented as 1/3X, where "X" is the ant's current distance. We would do 1/3rd times "X" to figure out how much the beetle climbed down.
So that means, if we added together the starting position of 3/4, plus the distance the beetle descended (1/3X), that would get us TO 2 1/2 inches below ground (the beetle's new current position). So therefore our equation is:
+
=
1b. Solve the equation written above from 1a.
+
=
-3/4 -3/4 [subtract 3/4 to start the process of getting x by itself]
= 1
*3/1 *3/1 [Multiply Reciprocal to get X by itself]
x=
1c. So we take the position of the ant figured out on 1b (5 1/4 inches), and the new current position of the beetle (2 1/2 inches), and subtract them
5 1/4 - 2 1/2 =