Read this excerpt from chapter 1 of wheels of change by sue macy. solid rubber tires and pedals replaced metal ones. frames were made of steel instead of iron or wood. seat springs were improved and brakes were added. the weight was reduced to 50 and then 40 pounds. each of these changes distanced the velocipede from its origins as a machine for the "swift of foot" until finally, a new term became popular for the two-wheeled wonder: bicycle. which of these were solutions that improved the velocipede? eliminating metal tires enhancing the construction of seats strengthening wooden frames adding iron for weight adding brakes

Hi,

The correct answers are:

eliminating metal tires

enhancing the construction of seats

adding brakes

(For anyone who still needs it on e2020)

sentences vary by structure as well as by function. there are compound, complex, and compound-complex sentences.

simple sentence

i like to read.

a simple sentence has one independent clause.

compound sentence

i like to read, and i also like to write.

a compound sentence includes more than one independent clause, connected by a coordinating conjunction (and, but, for, nor, or, so, or yet).

complex sentence

i prefer to read books that are bestsellers.

a complex sentence includes one independent clause and one or more dependent clauses. (a dependent clause is one that cannot stand alone.) types of dependent clauses include relative clauses (i kicked the boy who pinched me), adverb clauses (i am going home now because i have a curfew), and noun clauses (i don't know what to do next).

compound-complex sentence

although i prefer to read current bestsellers, i do like to read old agatha christie mysteries, and i also like some 20th-century science fiction.

compound-complex sentences take a bunch of clauses (multiple independent clauses, and one or more dependent clauses) and toss them together like a salad. although these sentences take practice to write in a grammatically correct fashion, they can hold a tremendous amount of meaning, and are common in academic writing.