Solve the system of equations using gaussian elimination method.
x + y + z - t = 4
2x - y +2z +3t = -8
-x + 2y - 3z + t = 4
3x + y + 2z - 3t = 9

Afurniture store has 1,500 chairs in storage. a manager uses three delivery receipts to simulate samples to check 100 chairs and note the number of brown chairs. suppose the actual number of brown chairs is 1,080. about how many brown chairs are

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)

Rewrite the following quadratic functions in intercept or factored form. show your work. y = x^2 + 7x + 10