Question

evaluate the expression when a=4 and c=-3. 3a - c

Explanation:

Step1: Substitute the values of a and c

Given \( a = 4 \) and \( c=-3 \), substitute these into the expression \( 3a - c \). So we get \( 3\times4-(-3) \).

Step2: Simplify the expression

First, calculate \( 3\times4 = 12 \). Then, \( -(-3)=3 \) (because subtracting a negative is like adding a positive). Now, add \( 12 + 3 = 15 \).

Answer:

15