Which expression is equivalent to 2 (a + 2 b) minus a minus 2 b?
3 a + 2 b
3 a-2 b
a-2 b
a + 2 b

What is the least common factor of 6 and 8

Abicycle training wheel has a radius of 3 inches. the bicycle wheel has a radius of 10 inches. approximately how much smaller, in square inches and rounded to the nearest hundredth, is the area of the training wheel than the area of the regular wheel? *

Which strategy is used by public health to reduce the incidence of food poisoning?