Evaluate the expression.0.4 x 2 divided by 0.8.write your answer as a integer or decimal do not round

Solve - pv + 40 < 65 for v solve 7w - 3r = 15 for r

Ageologist had two rocks on a scale that weighed 4.6 kilograms together.rock a was 0.5 of the total weight.how much did rock a weigh?

Graph the line that represents a proportional relationship between d and t with the property that an increase of 33 units in t corresponds to an increase of 44 units in d. what is the unit rate of change of dd with respect to t? (that is, a change of 11 unit in t will correspond to a change of how many units in d? )