Stella aunty decided to prepare a cake for her son's birthday. She chose a recipe which included baking with the following ingredients: 

$200 \mathrm{g}$ sugar, $150 \mathrm{g}$ flour, $150 \mathrm{g}$ butter, $100 \mathrm{g}$ milk, $3$ eggs, $5 \mathrm{g}$ baking soda and $1$ teaspoon essence. 

In the given linear equation, the variable $x$ represents one of the ingredients of the cake. Solve the equation and find the name of the ingredient according to the solution of the equation.

$\frac{x}{5}+5=9\times 5$

Stella aunty decided to prepare a cake for her son's birthday. She chose a recipe which included baking with the following ingredients: 

$200 \mathrm{g}$ sugar, $150 \mathrm{g}$ flour, $150 \mathrm{g}$ butter, $100 \mathrm{g}$ milk, $3$ eggs, $5 \mathrm{g}$ baking soda and $1$ teaspoon essence. 

Stella's aunty drew four lines with fruit jam on the cake as shown above. Name the pairs of parallel lines.

Stella aunty decided to prepare a cake for her son's birthday. She chose a recipe which included baking with the following ingredients: 

$200 \mathrm{g}$ sugar, $150 \mathrm{g}$ flour, $150 \mathrm{g}$ butter, $100 \mathrm{g}$ milk, $3$ eggs, $5 \mathrm{g}$ baking soda and $1$ teaspoon essence. 

Stella's aunty drew four lines with fruit jam on the cake as shown above. Name the pairs of intersecting lines.

Stella aunty decided to prepare a cake for her son's birthday. She chose a recipe which included baking with the following ingredients: 

$200 \mathrm{g}$ sugar, $150 \mathrm{g}$ flour, $150 \mathrm{g}$ butter, $100 \mathrm{g}$ milk, $3$ eggs, $5 \mathrm{g}$ baking soda and $1$ teaspoon essence. 

Stella's aunty drew four lines with fruit jam on the cake as shown above. Name the transversals made on the line $AB$ and $DC$.

Stella aunty decided to prepare a cake for her son's birthday. She chose a recipe which included baking with the following ingredients: 

$200 \mathrm{g}$ sugar, $150 \mathrm{g}$ flour, $150 \mathrm{g}$ butter, $100 \mathrm{g}$ milk, $3$ eggs, $5 \mathrm{g}$ baking soda and $1$ teaspoon essence. 

Stella's aunty drew four lines with fruit jam on the cake as shown above. Are the four triangles made on the four corner equilateral?

If the whole cake is represented by the algebraic expression $9x^2+5x-4$ and the portion of the cake eaten in birthday party is $4x^2-10x+5$, find the portion of cake which is left after the party.