Simplify 4n 5 + 3.5n 5 + (-2.1n 5).

a.20n5
b.6.4n5
c.5.4n5
d.4.4n5

Akite is being flown at a 45 angle. the string of the kite is 120 feet long. how high is the kite above the point at which the string is held?

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 ?

What percent of 18 is 24? and plz explain thx.