the ratio of boys to the total number of students in a school play is 4: 7. there are 9 girls in the school play. how many students are in the school play?

Which expression is equivalent to 2x^2+7x+4?

The sum of the reciprocal of a positive number and the reciprocal of 2 more than the number is 3/4 equation: the number is

In 2009, there were 1570 bears in a wildlife refuge. in 2010, the population had increased to approximately 1884 bears. if this trend continues and the bear population is increasing exponentially, how many bears will there be in 2018?