Question

PLS SOLVE FAST UR PARENTS WILL LIVE FOR 200 YEARS​

Answer 1

a) 1 + 4 + -5
b) 1 + 4 + -5
Hope this helps you

Answer 2

a) 20, 1, -21

20 + 1 + (-21)

21 - 21

= 0

20, 1 and -21 are three numbers whose sum is zero

b) 6, 4, -5

6 + 4 + (-5)

10 - 5

= 5

6, 4, -5 are three numbers whose sum is five