Matthew invested $3,000 into two accounts. One account paid 3% interest and the other paid 8% interest. He earned 4% interest on the total investment. How much money did he put in each account?

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Q: Nina invests $1,750 into two savings accounts. One account earns 3.5% annual interest and the other…

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Q: Jamal borrowed ​$9,000 to buy a used car. He borrowed some of the money from a bank that charged…

A: Let Jamal borrowed x dollar from bank and (9000-x) dollars from friend.

Q: Isaac started a new job where he earned 12% commission off his sales. How much commission would he…

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Q: A bank loaned out $23,500, part of it at the rate of 4% annual interest, and the rest at 13% annual…

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Q: A person inherited $30,000 and invested the money in two accounts that earned 8.5% and 10% simple…

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Q: earned

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Q: Nina receive an inheritance of $12500 from her grandmother. She invested part of it at 5% interest,…

A: Nina receive an inheritance of $12500 from her grandmother. She invested part of it at 5% interest,…

Q: Sam invested $9600, some at 6.2% interest and the rest at 8.6%. How much did he invest at each rate…

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Q: Hosea is given $100. Each day, he gains 1% on the total dollar amount he has, then he loses 1% of…

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Q: Barbara works for Real Realtors.  Monthly she receives a commission of 3% of her total sales.  Last…

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Q: emily kailyn received an inheritance of $208,000.00 from her grandfather and invested part at 10%…

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Equations and Inequations

Equations and inequalities describe the relationship between two mathematical expressions.

Linear Functions

A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.