There are a total of 122 countries in Africa, Europe, and North America (as of 2003). Europe has twice as many countries as North America, and Africa has seven more than Europe. How many countries are in each of these three countries?

The sales tax on a $20 hammer is 7 percent, or $1.40. why is this tax a bigger burden for josh, who has a $15,000 income, than for aaron, who has a $150,000 income?

From the 10 male and 8 female sales representatives for an insurance company, a team of 4 men and 3 women will be selected to attend a national conference on insurance fraud. In how many ways can the team of 7 be selected

How many hours are in 1/4+3/5

Complete the equation:1 (2/3) mi = how many ft.

Which of the following expressions is equivalent to the logarithmic expression below? log4 7/x^3

Every cupcake Jake bakes weighs 0.45 pounds how much will a box of 100 Cupcakes weigh

The surface area of the given cube is 150 square feet. a) 5 cubic feet b) 25 cubic feet c) 125 cubic feet d) 625 cubic feet

If x=7+root 40, find the value of root x+1by the root of x

The last time andy went bowling he had a mean score of 158 per game. After 3 games Andy has a total score of 473 He thinks he needs to score over 160 in game 4 to get a mean score greater than 158. Is he correct? Show a check of working

8*{[ (7+4*2-[ (11-7) * 4]}