3 years ago

I need help please help me

1 answer:

4 0

(Scroll to the bottom to see my answer) The order of operations is PEMDAS aka Parentheses. Exponents. Multiplication or Division (Which ever come first). Addition or Subtraction (again whichever comes first). Start with (12-9)=3 then multiply 3 by 3, three times=9 then multiply 2 and 7 together=14 then do 9-14=-5

So my final answer is -5! I might be wrong but I did my best! I hope I’m not too late!

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ABC est un triangle rectangle en B. On donne : AB = 7:BC = a et AC = a +5. Calcule a

Afina-wow [57]

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