Question

1. 5a - 3.6 + 10 + 2a

Explanation:

Step1: Combine like terms for the variable \(a\)

We have \(5a\) and \(2a\). To combine them, we add their coefficients. The coefficient of \(5a\) is \(5\) and the coefficient of \(2a\) is \(2\). So, \(5a + 2a=(5 + 2)a = 7a\).

Step2: Combine the constant terms

We have \(-3.6\) and \(10\). To combine them, we add these two numbers: \(-3.6+10 = 6.4\).

Step3: Combine the results from Step1 and Step2

After combining the like terms for the variable and the constant terms, we get the simplified expression: \(7a+6.4\).

Answer:

\(7a + 6.4\)