hey the answer is the last one z= 2k -5
Answer:
the first and second ones
Step-by-step explanation:
The answer is -420 (negative four-hundred and twenty)
Answer:
Step-by-step explanation:
salut :
en utilisant le theorem de Pythagore on obtient :
AC²= AB² + BC²
(a+5)² = 7²+a²
a²+10a+25 = 49+a²
10a+25 =49
10a =24
donc : a = 24/10 = 12/5 = 2.4 unit