Answer:
[tex]4x+1[/tex]
Step-by-step explanation:
This is easy to understand if explained step-by-step. 4 is a constant (its value never changes), so we can leave it in the expression to maintain its value. So far it's the only term in the expression. "A number" could represent any value. This means we can represent it as x, and this allows it to take the value of any constant without changing the value of the expression. So the product of 4 and a number would be 4x (4 multiplied by x). Increased by 1 is simple, it is just adding 1 to the expression.
The final answer would look like [tex]4x+1[/tex].
