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1
vote
2answers
745 views

Equal, is equal to, equals, are equal to

Which is correct? Given 240 kph (240 kilometres per hour) = 149 mph (149 miles per hour) How does one say this? -240 kph equal 149 mph. -240 kph equals 149 mph. -240 kph is equal to 149 mph. ...
2
votes
7answers
2k views

Who/What decides if a word is “proper” English?

I was taught since kindergarten that "ain't" isn't a proper English word. I was wondering, who determines which words are acceptable and which words are not? Do words ever go from "improper" to ...