Write an equation for a line perpendicular to y=3x+2 and passes through (3,1)

Mary had at least an 80% on her test write an inequality to represent this situation

Afarmer sells 9.5 kilograms of apples and pears at the farmer's market. 4/5 of the weight is the apples and the rest is the pears. how many kilograms of pears did she sell at the farmers market

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.