Final answer:
The expression -7 1/4 x 3 3/4, when evaluated with x = -4 (though x is not used), results in -27.1875.
Step-by-step explanation:
To evaluate the expression -7 1/4 x 3 3/4 for x = -4, first, you need to convert the mixed numbers to improper fractions.
-7 1/4 becomes -29/4 (since 7*4 + 1 = 29), and 3 3/4 becomes 15/4 (since 3*4 + 3 = 15).
Then, multiply these two fractions.
Next, substitute x = -4 into the expression, acknowledging that x here is not relevant as there is no variable in the original expression to substitute it into.
However, to complete the evaluation, multiply the improper fractions:
-29/4 * 15/4 = -435/16
Now convert this to a decimal by dividing -435 by 16:
-435 ÷ 16 = -27.1875