Linda and her three sisters have a total of 37 dolls. linda has twice as many dolls as jessica. rebecca has 3 times the number of dolls as jessica but 1 less than kellie. how many dolls each girl have?

You are on a cycling trip around europe with friends. you check the weather forecast for the first week. these are the temperatures for the week. sun mon tues wed thurs fri sat 16°c 20°c 24°c 28°c 28°c 23°c 15°c what is the mean temperature forecast for the week?

Sole with work in 10 years, the average number of hours of tv watched per week by teenagers dropped from 23.9 to 21.4. find the percent of change.

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)