Line x and line z are straight lines which pair is vertical

Multiplying an even number of negative numbers gives an answer that is choose from:

Type the correct answer in each box. use numerals instead of words. if necessary, use / for the fraction bar. consider the given table.

Evaluate 3(a + b + c)squared for a = 2, b = 3, and c = 4. a. 54 b. 243 c.729 add solution .