Answer:
Step-by-step explanation:
You need to complete the square on the right side.
Answer:
- $8000 at 1%
- $2000 at 10%
Step-by-step explanation:
It often works well to let a variable represent the amount invested at the higher rate. Then an equation can be written relating amounts invested to the total interest earned.
__
<h3>setup</h3>
Let x represent the amount invested at 10%. Then 10000-x is the amount invested at 1%. The total interest earned is ...
0.10x +0.01(10000 -x) = 280
<h3>solution</h3>
Simplifying gives ...
0.09x +100 = 280
0.09x = 180 . . . . . . . subtract 100
x = 2000 . . . . . . divide by 0.09
10000 -x = 8000 . . . . amount invested at 1%
<h3>1.</h3>
$8000 should be invested in the 1% account
<h3>2.</h3>
$2000 should be invested in the 10% account
The answer is the first one.
I hope this help c:
Answer:
To do this, you wold need to know the percent error formula.
Percent Error = (Actual value - Expected Value)/Expected Value x 100
Percent Error = (388 - 400)/400 x 100
P.E = (-12)/400 x 100
-0.03 x 100
-3%
(It could possibly positive, if they don't take negative)
Hope this helps!
