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goblinko [34]
3 years ago
9

Ramon invested $2,400 into two accounts. One account paid 3% interest and the other paid 6% interest. He earned 5% interest on t

he total investment. How much money did he put in each account?​
Mathematics
1 answer:
bekas [8.4K]3 years ago
8 0

Answer:

In the account that paid 3% Ramon put \$800

In the account that paid 6% Ramon put \$1,600

Step-by-step explanation:

we know that

The simple interest formula is equal to

I=P(rt)

where

I is the Final Interest Value

P is the Principal amount of money to be invested

r is the rate of interest  

t is Number of Time Periods

P(rt)=Pa(rat)+Pb(rbt)

in this problem we have

t=t\ years\\ P=\$2,400\\ Pa=\$x\\ Pb=\$(2,400-x)\\r=0.05\\ra=0.03\\rb=0.06

substitute

2,400(0.05t)=x(0.03t)+(2,400-x)(0.06t)

solver for x

Simplify

2,400(0.05)=x(0.03)+(2,400-x)(0.06)

120=0.03x+144-0.06x

0.03x=24

x=\$800

therefore

In the account that paid 3% Ramon put \$800

In the account that paid 6% Ramon put \$2,400-\$800=\$1,600

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These two examples illustrate how the use of parentheses can change the order.

Example 1:
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Use PEMDAS to obtain
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If we apply the parentheses: (5+7)/3x4-2/5
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which is a different answer.

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