A particular group of people 60 percent have both brothers and sisters. 70 percent of the group have 2 brothers, and20 percent of the group have a sister. What percent of the group have 2 brothers and a sister?

Monica build a remote control toy airplane for science project to test the plane she launched it from the top of a building the plane travel a horizontal distance of 50 feet before landing on the ground a quadratic function which models the height of the plane in feet relative to the ground at a horizontal distance of x feet from the building is shown

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.

The larger of two number is 4 less than twice the smaller number. the sum is 41. find the numbers