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 :/

Three friends went on a road trip from phoenix, az, to san diego, ca. mark drove 50 percent of the distance. jason drove 1/8 of the distance. andy drove the remainder of the distance. 1. andy thinks he drove 1/4 of the distance from phoenix, az, to san diego, ca. is andy correct? 2. the distance from phoenix, az, to san diego, ca, is 360 miles. how many miles did each person drive? 3. solve the problem. what is the answer in total?

Charlie tosses five coins.what is the probability that all five coins will land tails up.

What is 6/10 rounded to the nearest half