Helena lost her marbles. but then she found them and put them in 4 bags with m marbles in each bag. she had 3 marbles left over that didn't fit in the bags. how many marbles does helena have in all?

For this case, the first thing we must do is define a variable:
 m = number of marbles
 We have then:
 "put them in 4 bags with m marbles in each bag"
 mathematically we have:
 4m
 Then,
 "She had 3 marbles left over that did not fit in the bags"
 mathematically we have:
 4m + 3
 
 Helena has:
 4m + 3 marbles.

i = 2 / - 5

step-by-step explanation:

evaluation of ( 2 - 4 ) ( p + q ) when p = 2 and q = 5 i, by putting values of p and q,                                                                    

0 = ( 2 - 4 ) ( p + q )0 = ( 2 - 4 ) ( 2 + 5 i ),   by multiplying these0 = ( 4 + 10 i - 8 - 20 i )0 = 4 - 8 + 10 i - 20 i0 = - 4 -10 i   0 = 2 ( - 2 - 5 i )0 / 2 = - 2 - 5 i- 2 - 5 i = 0- 5 i = 2i = 2 / - 5