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Chapter 3: Q. 3.6 (page 306)
The difference of a number and eleven is −7. Find the number
The number is 4
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The sum of two numbers is zero. One number is nine less than twice the other. Find the numbers.
Marco hasto save for his daughter’s college education. He wants to divide it between one account that pays interest per year and another account that pays interest per year. How much should he invest in each account if he wants the interest on the total investment to be ?
Elvira and Aletheia live miles apart on the same street. They are in a study group that meets at a coffee shop between their houses. It took Elvira half an hour and Aletheia two-thirds of an hour to walk to the coffee shop. Aletheia’s speed is miles per hour slower than Elvira’s speed. Find both women’s walking speeds.
The sum of two numbers is 14. One number is two less than three times the other. Find the numbers.
Guillermo bought textbooks and notebooks at the bookstore. The number of textbooks was more than twice the number of notebooks. He bought textbooks. How many notebooks did he buy?
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