Betty can mow a lawn in 90 minutes. Vanessa can mow the same lawn in 60 minutes. How long does it take for both Betty and Vanessa to mow the lawn if they are working together?

SOlve the system of equations using substitution y=2x-10 y=4x-8

How old George Washington

After a 15% discount an item cost 22.27 what was the original price?

Express in scientific notation. 0.0872

Two big bags of sugar plus one small bag of flour add up to a total of 12 kg. The difference between the weight of one bag of sugar and one bag of flour is 2 kg. What is the weight of a bag of sugar and a bag of flour?

Write the equation in standard form 4x-3=5y

If John starts work at 8.845am and finishes at 5.15pm. He has 90 minutes of break. How many hours does he work in 5 days?

What is 5a=100 i need a answer?

What does 16/6 equal to as a whole number

How do you find the perimeter of a triangle?