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The sum of the digits of a two-digit number equals 7, if the digits in the two-digit number are switched the value of the two-digit number will increase by 9...what is the original two-digit number...

Michael bought some tigerfish at \$3 each and some goldfish at \$4 each for his new aquarium. If Michael bought a total of 12 fish and spent a total of \$40, how many goldfish did he buy?

A grocer knows that if he sells his canned hams for \$8 each, he can sell 950 per month, and if he sells the same hams for \$10, he will sell 900 per month. Assuming the relationship between price and...

Fernando has \$10 to buy snacks for his friends at the baseball game. A package of peanuts costs \$0.99 and a box of Cracker Jacks costs \$1.79. This relationship can be represented by the inequality...

You are working in a chemistry lab. You have 1000 milliliters of pure acid. A dilution of acid is created by adding pure acid to water. A 40% dilution contains 40% acid and 60% water. You have been...

Lia must work at least 5 hours per week in her family’s restaurant for \$8 per hour. She also does yard work for \$12 per hour. Lia’s parents allow her to work a maximum of 15 hours per week overall...

Mary Ellen is trying to decide whether or not she can afford to purchase a car. She determines that it costs 22 cents per mile to drive her car, plus a fixed monthly cost of \$230 for car payments...