Which Expression has a value of 250

A 1+6 x 7

The u. s. constitution outlawed slavery. true false

How did the king kanissa’ai become very rich

The telegraph, the transatlantic telegraph cable, and the telephone were important to businesses after 1850 because of a. they created a system for developing new inventions. b. they filled a need that other inventions of the day could not. c. they attracted investors and created the stock market. d. they made picture-taking a popular american pastime.