Answer:
492.99
Step-by-step explanation: x = amount invested at 12%
y = amount invested at 9%
---
x + y = 20287
0.12x = 0.09y + 492.99
---
put the system of linear equations into standard form
---
x + y = 20287
0.12x - 0.09y = 492.99
Answer:
[
3
,
∞
)
Set-Builder Notation:
{
x
|
x
≥
3
}
Step-by-step explanation:
420 is the least common multiple for 21, 28, 35
