I think its c hope this helps sorry if it dont
5x - 9 = 26
5x - 9 + 9 = 26 + 9
5x = 35
5x/5 = 35/5
X = 7
The distance between 2 points P(a, b) and Q(c,d) is given by the formula:

,
Apply the formula for the points M(6, 16) and Z(-1, 14):

which rounded to the nearest tenth is 7.3 (units)
Answer: 7.3 units
Zero.
Anything times zero is zero.
-20 * -10 = 200
200 * -1 = -200
-200 * 0 = 0