Question

If a*b means 2a + b , then what is 2*5 ?

Answer 1

To solve this problem you must apply the proccedure shown below:

If
`(a)(b)=2a+b`, you have that:

`(2)(5)=(2)(2)+5=9`

Because
`a=2` and
`b=5`

Therefore, as you can see, the answer is:
`9`

Answer 2

9

Step-by-step explanation

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