Answer:
385 + 215
Step-by-step explanation:
Any negative number subtracted by a negative is equal to an addition problem. 1 + (-1) = 0. 1 - (-1) = 2.
Answer:
D
Step-by-step explanation:
Area of a circle is pi(radius^2)
the diameter of the given circle is 18km
the radius is half so it’s 9km
A = pi(9^2)
A = 81pi km2
The answer will be No, it is not a valid inference because his classmates do not make up a random sample of the students in the school. Hope it help!
