Answer:
- $12,000 at 4%
- $9,000 at 2%
Step-by-step explanation:
If x represents the amount invested at 4%, then the total interest earned is ...
0.04x + 0.02(21000 -x) = 660
0.02x = 240 . . . . . . . . . . . simplify, subtract 420
x= 240/0.02 = 12,000 . . . . amount invested at 4%
21,000 -x = 9,000 . . . . . . . . amount invested at 2%
The amount invested at 2% is $9,000.
The amount invested at 4% is $12,000.
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<em>Comment on method of solution</em>
These problems can usually be solved using one variable for the amount associated with the highest contribution to the mix. Here, that is the amount getting 4% interest. This keeps the numbers in the solution positive, helping to minimize errors. As you can see, the solution develops in about 2 or 3 steps. Other methods can take longer.
Since these two coordinates are on the same Y-axis, we can assume that this is a straight line and do not need to create a triangle and solve for the hypotenuse. The distance from -8 to 0 is 8, and the distance from 0 to 7 is 7. Meaning that the distance between the two points is 15 units.
Answer:
b
Step-by-step explanation:
Answer:
Yes.
Step-by-step explanation:
Searched it up and I am just hoping it's right. Have a good one ;)
NH+r=T
The hours times the hourly rate plus the one time fee equals the total amt. of money