Evaluate 1/3m - 1 - 1/2n when m=21 and n=12

1/3m - 1 - 1/2n = 0

M = 21, N = 12

1/3(21) - 1 - 1/2(12) = 0

21/3 - 1 - 12/2 = 0

7 - 1 - 6 = 0

6 - 6 = 0

0=0

0

Step-by-step explanation:

Lets substitute m=21 and n=12 into the expression

1/3m-1-1/2n

=1/3(21)-1-1/2(12)

=7-1-6

=0

a28=58

step-by-step explanation:

a1=a1+(n-1)d

a28= 4+ (28-1)2

a28=4+(27)(2)

a28=4+54

a28=58