in a school, the number of boys is 9 more than thrice a number of girls. if the total role of class is 60. what is the total role of girls . please help ASAP

Which of the binomials below is a factor of this trinominal? x^2-13+30

Jamie went to home depot.she bought 25 bags of soil that cost $9 per bag.she bought 15 pots at $8 each, and she bought 23 bags of pebbles at $15 each.she used a coupon that gave her $5 off for every 100 dollars she spent. how much did jamie pay at the end?

Apatient is to be given 35 milligrams of demerol every 4 hours. you have demerol 50 milligrams/milliliter in stock. how many milliliters should be given per dose?