-3x+y+z=-1, 2x+y-z=-4, x-y+z=7 getting sums -x+2y=-5, 3x=3, from the second we can easily see: x=1, which makes -x+2y=-5 become: -1+2y=-5, 2y=-4, y=-2, making x-y+z=7 become: 1--2+z=7 1+2+z=7, z=4 So the solution to the system of equations is: (1,-2,4)
answered: Guest
37
step-by-step explanation:
answered: Guest
distance covered by pamela in 9 l of fuel = 99km
let us apply unitary method here.
distance covered by pamela in 1 l of fuel =99/9 =11 km
now let us find distance covered by pamela if she has 12 l of fuel.
distance covered in 12 l = distance covered in 1 l of fuel * 12
we know that distance covered by here in 1 l is 11 km.
so distance covered in 12 l of fuel = 11*12 = 132 km.
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
Determine if the solution set for the system of equations shown is the empty set, contains one point or is infinite. x + y = 5 x + y = 7 {} 1 solution infinite