How do you do common numinators

The numbers of girls in a second grade class in 4 less than the number of boys. Let b represent the number of boys in the class, and write an expression that represents the number of girls.

A store is offering a 15% discount on all items. Also, employees get a 10% employee discount. If you are an employee which discount would you want to be applied first to save the most money? a. Not enough information is given. b.

You are designing a poster that will be 3 yd wide and 8 ft high. How much paper do you need to make the poster? Give your answer in square feet.

Which of the follwong numbers must be added to complete the square in the equation below? x^2+6x-19=23 A. 19 B. 3 C.-9 D. 9

Bill was planning a trip to Saudi Arabia. Before going, he did some research and learned that the exchange rate is $1 = 3.7 Riyals. How many Riyals would he get if he exchanged $11.60? A) 3.1 Riyals B) 38.6 Riyals C) 40.5 Riyals D) 42.9 Riyals

How many cubic blocks of side length 1/7 inch would it take to fill a cube with a side length of 3/7 inch?

Write a world problem that can be solved by drawing an array. then draw the array and solve the problem

If I Have 55, then times that by three then divide it by 9, then add 16, What Is My Answer?

Cheese sticks that were previously priced at "5 for $1" are now "4 for $1". Find the percent increase in the price per cheese stick.

True or false: A triangle can be drawn with an angle of 60, 60 and 70