4x + 20
x - 2
40 + 24 / 8 -3 +1 = 41
40
40
50 + 40 + 40 + 40 + 30 + 30 + 20 + 10 = 260
Factorise it: (x + 5)(3x - 8)
30
40 psi plus or minus 540 psi plus or minus 5
40
12 x (1 + (30/100)) = 15.6 x (1 - (15/100)) = 13.26 x (1 + (40/100)) = 18.564
40 psi plus or minus 540 psi plus or minus 5