20/21 is the answer to your problem.
1. 7/10(1/5=2/10)
2. 1/12(1/2=6/12)
the cost of the eggs
cost (x) = x*price
this is an example of a proportional cost relation with the size been x


the dotted line. shadow under the line

solid line. shadow above the line
Answer in the attachment (graph C).
Answer:
Area Of a Right Angled∆
=><em><u> </u></em><em><u>1</u></em><em><u>/</u></em><em><u>2</u></em><em><u> </u></em><em><u>x </u></em><em><u>Base </u></em><em><u>x </u></em><em><u>Height</u></em>
Area of a ∆ Using Heron's Formula
=>

Where
- S = Semiperimeter
- a ,b& c = sides of the ∆