exam
Maths Puzzle
Numerical Ability
solve the system using matrices. Use Gaussian elimination with back-substitution or Gauss-Jordan elimination:
w+x+y+z=5
w+2x-y-2z=-1
w-3x-3y-z=-1
2w-x+2y-z=-2
Read Solution (Total 0)
exam Other Question
A cashier has 2 times as many nickels as quarters, 15 more dimes than quarters that worth $3.75 in total. Find how many dimes she has.
if 7y-6 = 5y-4 then what is y??