Lines de and ab intersect at point c.
what is the value of x?

Abike shop sells you a bicycle for $63 and a helmet for $21. the total cost is 150% of what the shop spent originally. how much did the shop spend originally? how much profit did the bike shop earn by selling the bicycle and helmet to you ?

Find the slope of the line passing through a pair of points

True or false: the graph of y=f(bx) is a horizontal compression of the graph y=f(x) if b< 1