What is the slope of the line passing through (-8, 10) and (-8,  -7)?

The slope is undefined in this case, because the line passing (-8, 10) to (-8, -7) is a vertical line.
when you use the slope formula, m=(-7-10)/[-8-(-8)], the denominator of this fraction is 0, so it is undefined. 

He secknd step was the answer to them

Answer: the correct answer is 10step-by-step explanation: let the number be n, then the expression becomes,then“twelve more than the quotient of a number and two, decreased by four” iswhen n=4,we substitute 4 whetever we see n to get,we simplify to obtain,we further simplify to get,therefore the correct answer is c.