Question

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.
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:

\[
\boxed{16}
\]