8-1×0+2÷2+=? ?
it's a question that looks simple but isn't

Liz had 140 pens and inna had 100 pens. after inna gave liz some pens, liz had 3 times as many pens as inna. how many pens did inna give liz?

Michael is training for a marathon. in his first week he plans to run 8miles. what path should he take

These tables represent a quadratic function with a vertex at (0, -1). what is the average rate of change for the interval from x = 9 to x = 10?