Find the value of x please help

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?

The cost of using a service is $0.25 per min. what equation correctly represents the total cost c, in dollars, for d days of use?

The price of a car has been reduced from $19,000 to $11,590. what is the percentage decrease of the price of the car?