Question

If a=b then which of the following is equal to 3a

a) 3•4
b)3+5
c) 3b
d) none of the above​

Answer 1

Given that a=b, the expression 3aa translates to 3bb or 3b² after substitution. None of the options provided match this expression, therefore the correct answer is d. None of the above.

Step-by-step explanation:

If a=b, then we are looking for which of the following options is equal to 3aa. Since a=b, we can replace 'a' with 'b' in 3aa. Therefore, 3aa becomes 3bb, which can also be written as 3b².

Now, looking at the options provided:

• 3⋅ 4 is simply 12 and is not dependent on the value of 'a' or 'b'.
• 3+5 is a sum that does not reflect the expression 3aa or 3b².
• 3b implies 3 times 'b' but does not include squaring 'b', so this is not equivalent to 3aa or 3b².
• Option d states 'none of the above', which by elimination, is the correct choice since none of the other options are equal to 3aa or 3b².

Therefore, the correct answer is d. None of the above.