Shalina uses the expression 3x to determine the cost of x notebooks. What is the cost of 24 notebooks?
thats wrong :(
The answer is 72, you just multiply 24x3
To find the cost of 24 notebooks, we can substitute the value of x into the expression 3x. In this case, x represents the number of notebooks Shalina is buying.
So, substituting x = 24 into the expression 3x:
Cost = 3 * 24
= 72
Therefore, the cost of 24 notebooks would be $72.