This picture models the addition expression 15 + 21. img1 an example of an equivalent expression is .

3(5+7)

Explanation:

four sitting presidents have been assassinated while in office but the first was abraham lincoln,

1. it was caused by feudalism

2. charlemagne used christianity as a major cornerstone for his rule. cloisters were built all over the empire to act as centers for the (re)population of the vast european wilderness.

3. the europeans feared the next raid every time chetak

i'm not so sure about #6. but i hope i you with the first 3.