Answer:
have a good night!
Step-by-step explanation:
I did another one just like this about an hour ago. I did it the elegant, tedious way,
and it took about 2 feet of screen. Then I realized there was a totally bourgeois but
easy way to do it. For 5 points, I'll give you the method for the masses:
List all the possible pairs of digits that add up to 9, along with their flips:
18 . . . . . 81
27 . . . . . 72
36 . . . . . 63
45 . . . . . 54
Do you see any pair that are different by 27 ?
How about 36 and 63 ?
So the original number is 63, and when you flip it, it becomes 36, which is 27 less.
Answer:
The two rates are 6% and 8%
Step-by-step explanation:
Call the two rates r1 and r2. Call p the principal. Write down the problem as an equation system:
which are 3 equations with 3 unknowns, so they can be solved. I first divide the two equations to get:
and use that in the third:
The two rates are 6% and 8%
Answer: The ratios of the area would be 3.5 times larger.
If you compare the ratios of the sides, you will find that they increase by 1.75 times.
28 / 16 = 1.75
Now, lets write an equation to see what change that would make on the area, if the sides increase by 1.75.
LW = A
1.74L x 1.75W = 3.5A
We have to multiply the 1.75 by 1.75 to find the change in area, which is 3.5.
Please explain more and I would answer!!!