Nadia has 20 more postcards than pete. after nadia gives pete some postcards, pete has 2 more postcards than nadia. how many postcards does nadia give to pete? 2.

11.

Step-by-step explanation:

N = Nadia.

P = Pete.

S = postcards that Nadia gives to Pete.

N = 20 + P

P + S = 2+N-S

To calculate S, we replaces N of the first equation in the second equation:

P + S = 2 + 20 + P-S

2S = 2 + 20 + P - P

2S = 22

S = 22/2 = 11.

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step-by-step explanation:

7 ft 6 in means 7 1/2, because 6 in is 1/2 of a foot. 7 ft 8 in means 7 2/3 because 8 in is 2/3 of a foot. 23/3 = 7 2/3. 15/2 = 7 1/2.

23/3   *   15/2   = 57 1/2

step-by-step explanation: