Mikayla bought 5 skirts at $x each. three of the 5 skirts came with a matching top for an additional $9 each. write and simplify an expression that represents the total cost of her purchase.

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?

Select the point that is a solution to the system of inequalities. y< =-x+3 y=x^(2)-3x

Me with this assignment ! i only partially understand, so explain. also it's a work sample. at the championship bike race, steve and paula were fighting for first place. steve was 175 feet ahead of paula and had only 300 feet left to go. he was very tired and was going only 9 feet per second. paula was desperate to catch up and was going 15 feet per second. who won the bike race and by how far did she/he win?