Math quick i need help hurry 15 points :)

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

Can someone me do math because i am having a breakdown rn because i don’t get it

X^2/100+y^2/25=1 the length of the major axis is: a)5 b)10 c)20