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telo118 [61]
3 years ago
12

Last year Tammy had $4,500 to invest in two savings accounts. One account earns 7% simple annual interest, and the other account

earns 6% simple annual interest. At the end of the year, Tammy had earned a total of $290 in interest from the two savings accounts.
Part A Write a system of two equations that could be used to find the amount of money invested in each account. Let x represent the amount invested at 7%, and let y represent the amount invested at 6%.
Part B Solve the system of equations. How much did Tammy have invested at each rate?
Mathematics
1 answer:
Nat2105 [25]3 years ago
7 0
Let x be the amount invested at 7% and y the amount invested at 6%

We know that the yearly interest earned = 0.07(x) and 0.06(y)
x+y =4500 
0.07x +0.06 y =290
Solving the equations will give , x = $2,000 and y=$2,500

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Answer:

$127.60

Step-by-step explanation:

If Lisa bought 30 shares of stock at $54.02 per share, total cost price will be:

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If she then sold her shares at $58.19 per share, her total selling price will be:

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Ami buys x apples and y bananas. The apples cost 15p each and the bananas cost 20p each. The total cost of Ami's apples and bana
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Answer:

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Step-by-step explanation:

Here, we are interested in writing an equation for the total cost of the apples and bananas

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The cost of bananas which is 20p will be 20/100 = £0.2

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The cost of bananas = number of bananas bought * price of bananas = 0.2 * y = £0.2y

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