My friend needs help finishing this but she isn’t sure what to do..can anyone help please?

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

The base of a triangle exceeds the height by 7 centimeters. if the area is 400 square centimeters, find the length of the base and the height of the triangle.

The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels