The concert lasts 60 minutes, and the songs are all the same length. the choir sings a total of 12 songs, 2 of which are sung by the sopranos only. for how many minutes do the sopranos sing by themselves? solve the equations using a letter for the unknown quantity.

What is the simplified form of (3.25x10^3)(7.8x10^6) written in scientific notation?

At the "no mutants allowed" country farm, every sheep has 4 legs, every chicken has two legs, and all animals have only 1 head. asked to count how many sheep and chicken are in the fields, a farm boy reports back that there are 140 feet and 50 heads. how many sheep and chicken are there? there are sheep and chicken at the farm.

Timmy uses 1 1 2 cups of sugar for every 2 gallons of lemonade he makes. how many cups of sugar would timmy use if he makes 13 gallons of lemonade?