Write the augmented matrix for the following system of equations. -1+4y+2z=0
z=6x+2y
2x=-2y-2+8z

Please help will give brainliest.!! I dont get this :/

Awater tank holds 18000 gallons. how long will it take for the water level to reach 6000 gallons if the water is used at anaverage rate of 450 gallons per day

What is the similarity ratio of a cube with volume 729m^3 to a cube with volume 3375 m^3

Grandpa ernie is shrinking! over the past 4 years his height decreased by a total of 2.4 cm. it decreased by the same amount each year. what was the change in grandpa ernie's height each year