If a*b means 2a + b , then what is 2*5 ?
2 answers:
To solve this problem you must apply the proccedure shown below:
If
, you have that:

Because
and 
Therefore, as you can see, the answer is: 
<u> Answer</u>
9
<u>Explanation</u>
a*b ⇒ 2a + b
2*5 ⇒ ?
Comparing a*b and 2*5, we can say that;
a = 2 and
b = 5
So, substituting a with 2 and b with 5 in the equation 2a + b we have,
a*b ⇒ 2a + b
2*5 ⇒ 2(2) + 5
⇒ (2×2) + 5
⇒ 4 + 5
⇒ 9
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