luisa bought a roll of ribbon. she used 34 inches on each of two gift. then ahe used 13 inches on a scrapbook page. there are 39 inches left. How many inches of ribbon did she start with?

In physics, the mass-energy equivalence is that the mass of a body is measured by its energy content. This may be written algebraically as E=mc2 , where E is energy, m is mass, and c is the speed of light in a vacuum.

Within a large metropolitan area, 20% of the commuters currently use the public transportation system, whereas the remaining 80% commute via automobile. The city has recently revitalized and expanded its public transportation system.

The lengths of the sides of a triangle are in the extended ratio 5 : 8 : 10. The perimeter of the triangle is 69 cm. What are the lengths of the sides?

Find the area of 8/3cmX24/4cm

Evaluate the series 8+4+2 + ...

A newspaper reporter wants to know how popular the hobby of bird watching is in the city. He asked people at the local bird refuge if they watched birds as a hobby. Which of the following best explains whether the reporters data is valid or not?

I am very confused on how to figure out if y = 3/4x is proportional?

Alison wants to buy a mountain bike for $339.12. If she saves $28.26 each month, in how many months will she be able to buy the bike?

At 12 o'clock the temperature was 7°C. The temperature decreased by - 20°C. What is the new temperature?

Ashleys rentals charges $27.50 per hour to rent a surfboard and a wetsuit. Darlas surf shop charges $23.25 per hour to rent a surfboard plus $17 extra for a wetsuit.