A computer repair company charges a $10 fee to come to your house to fix your computer plus $25 per hour while they are there. What is x, the number of hours they could charge in order for your total cost to be at least $150?

Let hh represent the number of hummingbirds and ss represent the number of sunbirds that must pollinate the colony so it can survive until next year. 6h+4s > 746h+4s> 74 this year, 88 hummingbirds pollinated the colony. what is the least number of sunbirds that must pollinate the colony to ensure that it will survive until next year?

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?

Liz had 140 pens and inna had 100 pens. after inna gave liz some pens, liz had 3 times as many pens as inna. how many pens did inna give liz?