There are 10 farmers that want to share some land. The land contains 11 fields that each contain 30 hectares. What fraction of a field would each farmer get?

Can you me find the missing length. i attached an image.

Match the scale and the actual area to the area of the corresponding scale drawing. scale: 1 inch to 4 feet actual area: 128 square feet scale: 1 inch to 7 feet actual area: 147 square feet scale: 1 inch to 8 feet actual area: 256 square feet scale: 1 inch to 5 feet actual area: 225 square feet area of scale drawing scale and actual area scale drawing area: 3 square inches arrowright scale drawing area: 8 square inches arrowright scale drawing area: 4 square inches arrowright scale drawing area: 9 square inches arrowright

If x-1 and x+3 are the factors of x3+10x2+ax+b find a and b