Factor out the greatest common factor 19. 2x^2+x20. 12x^5-36x21. 15x-5y^2

An appliance store sells a washer-dryer combination for $1800. if the washer costs $300 more than the dryer, find the cost for each appliance.

Me because some of question i don’t understand

Which are factor pairs of 350? choose all answers that are correct. a) 30 and 12 b) 35 and 10 c) 70 and 5 d) 2 and 125