Solve the system and write the answer as an ordered triple: X + Y - Z = 4

2x + 3y - z = 8

x - y = -z

ANSWER CHOICES IN PICTURE

If the sales price of a dvd is $20 and the markup is 34%, what is the cost of the dvd?

How many kilograms of a 5% salt solution and how many kilograms of a 15% salt solution must be mixed together to make 45kg of an 8% salt solution?

Need to finish my juan wants to build a greenhouse in his back yard. he needs to maximize the ratio of floor area to structure volume in order to provide the most room for plants while minimizing the area to be heated. find the description of the structure that best meets juan’s criteria. a.) a hemisphere with a diameter of 12 feet b.) a cube with a side length of 12 feet c.) a cone with a diameter of 12 feet and a height of 10 feet d.) a square pyramid with a base side length of 12 feet and a height of 9 feet