4/9 + 1/5 (common denominator is 45)
20/45 + 9/45 = 29/45
Answer: f(3) = 14
Concept:
Here, we need to understand the idea of evaluation.
When encountering questions that gave you an expression with variables, then stated: "If x = a, y = b, z = c" (a, b, c are all constants), this means you should substitute the value given for each variable back to the expression.
Solve:
<u>Given function</u>
f(x) = 4x + 2
<u>Substitute value of the x into the expression</u>
f(3) = 4(3) + 2
<u>Simplify by multiplication</u>
f(3) = 12 + 2
<u>Simplify by addition</u>
f(3) = 
Hope this helps!! :)
Please let me know if you have any questions
<u>ANSWER</u>
Commutative property of addition.
<u>EXPLANATION</u>
Let a,b be real numbers. The commutative property of addition states that,

If we let a=-10 and b=6, then

Therefore the given expression demonstrates the commutative property of addition.
The commutative property of addition tells us that, the order in which we add two real numbers does not affect the result.