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Mandarinka [93]
3 years ago
5

An executive invests $22,000 some at 7% ad some at 6% annual interest. If he receives an annual return of $1,420, how much is in

vested at each rate?
Mathematics
1 answer:
34kurt3 years ago
8 0

Answer:

he invested $10,000 at 7% and $12,000 at 6%

Step-by-step explanation:

  • There are 2 equations that appear from this problem
  • X+Y=22,000 and 0.07x + 0.06y = 1420
  • Lets start by simplifying X+Y=22000

Y = 22000 - x

  • now plug this into the Y value for the other equation

0.07x + 0.06(22000-x) = 1420

0.07x + 1320 -0.06x = 1420

0.01x = 100

X = 10000

  • now plug 10000 into x for the simplified equation

Y = 22000 - 10000

Y = 12000

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Step-by-step explanation:

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Step-by-step explanation:

This one is similar to the other one done with graphs , the only difference is we have equations instead of graphs.

Like the other one, we want to find f(2) and whatever that equals we plug into g(x) to find g(f(2))

So first lets find f(2)

f(x) = x - 4

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