A grocer has 400 pounds of coffee in stock, 20 percent of which is decaffeinated. If the grocer buys another 100 pounds of coffee of which 60 percent is decaffeinated, what percent, by weight, of the grocer's stock of coffee is decaffeinated?
If Mario was 32 years old 8 years ago, how old was he x years ago?
If ~$\frac{x}{4}$~ is 2 more than ~$\frac{x}{8}$~ , then ~$x=$~
Which of the following represent positive numbers?
I. -3 - (-5)
II. (-3)(-5)
III. -5 - (-3)
There are five sales agents in a certain real estate office. One month Andy sold twice as many properties as Ellen, Bob sold 3 more than Ellen, Cary sold twice as many as Bob, and Dora sold as many as Bob and Ellen together. Who sold the most properties that month?
Guadalupe owns 2 rectangular tracts of land. One is 300 m by 500 m and the other is 250 m by 630 m. The combined area of these 2 tracts is how many square meters?
If the average (arithmetic mean) of 5 numbers ~$j$~, ~$j + 5$~ , ~$2j - 1$~ , ~$ 4j - 2$~ , and ~$5j - 1$~ is 8, what is the value of ~$ j$~ ?
The maximum recommended pulse rate R, when exercising, for a person who is x years of age is given by the equation ~$ R = 176 - 0.8x.$~ What is the age, in years, of a person whose maximum recommended pulse rate when exercising is 140 ?
Of the following, which is least?
A group of store managers must assemble 280 displays for an upcoming sale. If they assemble 25 percent of the displays during the first hour and 40 percent of the remaining displays during the second hour, how many of the displays will not have been assembled by the end of the second hour?