3 radical 70. 9 times 70 is 630, 9 squared is 3.
He is wrong...
2 1/2 + 3 3/5 = 97/20
Simplified, I believe the answer is 4 17/20
Answer:

Step-by-step explanation:
Use PEMDAS:
P Parentheses first
E Exponents (ie Powers and Square Roots, etc.)
MD Multiplication and Division (left-to-right)
AS Addition and Subtraction (left-to-right)
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Answer:
4(3+5)-3.94
4(8)-3.94
32 - 3.94
what do you mean by . multifaction or decimal
Step-by-step explanation: