Solve using system of substitution

x + 2y + 4z = 7
-x + y + 2z = 5
2x + 3y + 3z = 7

Answer 20 points and brainiest ! on the board, your teacher writes an example of how to find the median. one of the numbers is erased, leaving what is shown, 18, 30, 26,12 22. what is the median? a. 10 b. 20 c. 24 d. 28

X^2/100+y^2/25=1 the length of the major axis is: a)5 b)10 c)20

There are a total of 75 students in the robotics club and science club. the science club has 9 more students than the robotics club. how many students are in the science club?