Final answer:
The expression 90-a+ba², with a=2 and b=8, evaluates to 120.
Step-by-step explanation:
The student has asked to evaluate the expression 90-a+ba² given that a=2 and b=8. First, we substitute the values of 'a' and 'b' into the expression:
90 - a + ba² = 90 - 2 + 8(2²) = 90 - 2 + 8(4) = 90 - 2 + 32 = 120
Thus, the evaluated expression equals 120.