Answer:
490
Step-by-step explanation:
489 to the nearest ten will be the tens number approximated; 490
Trinomial
This is because there are three terms involved in the equation.
One of them is -7ab^4. Another is 4c^3. The third one is 25.
27
18/40 = 27/60
1.5
12 / 8 = 1.5