Start by finding the value of the first expression when a=1 and b=2. Substitute 1 for a and 2 for b, then evaluate the expression. You can solve on paper and enter your answer on Zearn.

Question

3a + 4b + a + 2b
=

Answer 1

To evaluate the expression \( 3a + 4b + a + 2b \) when \( a = 1 \) and \( b = 2 \), substitute these values into the expression:

\[ 3(1) + 4(2) + 1 + 2(2) \]

Now, calculate each term:

\[ = 3 + 8 + 1 + 4 \]

Now, add these values together:

\[ 3 + 8 = 11 \] \[ 11 + 1 = 12 \] \[ 12 + 4 = 16 \]

So, the value of the expression is:

\[ \boxed{16} \]