Which of the following sets are subspaces of R3?A. {(x, y,z) | 2x−7y−3z=0}B. {(x, y,z) | x, y,z>0}C. {(x, x+2,x−7) | x arbitrary number }D. {(−5x−8y,−6x−4y,−9x+4y) | x, y arbitrary numbers }E. {(x, y,z) | −2x+7y=0,3x−5z=0}F. {(x, y,z) | 6x+9y+8z=5}

News cameras take an overhead picture of a crowd at an outdoor event journalist then count the total number of people in the picture and use the sample of estimate the total number of people in the crowd this process is an example of

Brent works part-time at a clothing store. he earns an hourly wage of $15. if he needs to earn more than $45 in a day and works for x hours a day, which inequality represents this situation? a. 15x > 45 b. 15x < 60 c. x > 60 d. 15x < 45 e. x < 60

Ineed to know the answer to this algebra question.