Answer:
Step-by-step explanation: 14+14 is 28 do this twice because you said 14x4
and that gets you another 28, add the two 28's together and you have 56
3................................
On her third test she should get 67 marks
so therefore 71 + 87 + 67 = 225
225 divide by 3 (as three tests) = 75
(20+4)x4 multiply 4x20=80 and 4x4=16. Add 80+16 and get 96.