The two numbers are very near 7200 and 300. The sum of those is a good estimate of your sum:
... 7200 + 300 = 7500
_____
If you're taught methods of addition that include "make a ten" or "make a hundred", you know you can "borrow" a 1 from 7203 (making it 7202) and loan that 1 to 299 to make it 300. Now, you know your sum is exactly 7202+300 = 7502, with no estimation necessary.
Set up an algebraic equation. This is what it looks like based on what the question tells you:
Let a = area of pentagon
a+27 = 4a-15
3a-15 = 27
3a = 42
a = 14
Since you used 28% of your paper
28% = .28
500 x .28 = 140 sheets used
0,500) (1,360)
m = 360-500/1-0
m = -140
Answer:
<em>y = -140x + 500</em>
Answer:
57
Step-by-step explanation:
