Trains A and B are traveling in the same direction on parallel tracks. Train A is traveling at 80 miles per hour[..]

In 1993, the life expectancy of males in a certain country was 68.3 years. In 1999, it was 70.8 years. Let E[..]

Soybean meal is 18% protein, cornmeal is 90% protein. How many pounds of each should be mixed together in order to[..]

The function H described by H(x) = 2.75 + 71.48 can be used to predict the height, in centimeters, of a woman whose[..]

The cost c of water is a linear function of n, the number of gallons used. If 1,000 gallons cost $4.70 and 9,000[..]

Media Services charge $40 for a phone ad $20/month for its economy plan. The equation c = 20t + 40 describes the[..]

The equation y = -1777 x + 27,153 can be used to predict the number y of gun deaths in the United States x years[..]

Amy paid $72.42 for a pair of running shoes during a 30% off sale. What was the regular price? The regular price[..]

A pension fund guarnantee a return of 4.5 percent a year. If I invest 30,000 per year for 20 years what would be my[..]

If an object is thrown upward with an initial velocity of 64 ft/sec, its height after t sec is given by h=64t-16t^2.[..]