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.
Answer:
-12
Step-by-step explanation:
I solved it to 60 = -5y,
then divide to get the answer -12.
If I have 130 dollars and a plate is 6.00 what is the greatest amount of plates I can buy
The function g is:
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Horizontally shrinking a function f(x) by a factor of is equivalent to finding f(ax).
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In this question, the function is:
Horizontally shrinking by a factor of means that , so:
Thus, the function g is:
A similar question is given at brainly.com/question/20379647