Solve –x + y + 2z = 2
2x – y + z = 5
-4x – y + 3z = 3

a.) (2, 5, 3)

b.) (0, 4, -1)

c.) (1, -1, 2)

d.) (-1, 1, -2)

I picked A, just not sure on it.

Which three lengths could be the lengths of the sides of a triangle? 21 cm, 7 cm, 7 cm 9 cm, 15 cm, 22 cm 13 cm, 5 cm, 18 cm 8 cm, 23 cm, 11 cm

Suppose a store sells an average of 80 cases of soda per day. assume that each case contains 24 cans of soda and that the store is open 10 hours per day. find the average number of soda that the store sells per hour.

Suppose that in 2008 , 840,800 citizens died of a certain disease assuming the population of teh country is 399 miliion, what is the mortality rate in units of deaths per 100,000 people?