Henry and Irene working together can wash all the windows of their house in 1h 28m. Working alone, it takes Henry 3.5 h more than Irene to do the job. How long does it take each person working alone to wash all the windows?

According to modern science, earth is about 4.5 billion years old and written human history extends back about 10,000 years. suppose the entire history of earth is represented with a 10-meter-long timeline, with the birth of earth on one end and today at the other end.

Agroup of students want to create a garden. they do not know the exact measurements but they propose using a variable to represent the length and width of the garden. the length of the garden is 10 feet longer than double the width. use a single variable to write algebraic expressions for both the length and width of the garden. write an algebraic expression for the area of the garden. use mathematical terms to describe this expression.

Linda loans her friend $250 with a 5% monthly intrest rate. how much was the whole loan?