Answer:
so $21+45%=30.45. meaning that pair of boots cost 30.45 so two pairs of boots would cost $60.90
Answer:
-7
Step-by-step explanation:

it is possible because x is just a letter representing the unknown nos
Answer:
y=8-4x
Step-by-step explanation:
the cost of the eggs
cost (x) = x*price
this is an example of a proportional cost relation with the size been x
Answer:

Step-by-step explanation:
The diagram shows three paralel lines which divide the large triangle into three similar triangles.
By Thales theorem,

Then

From the similarity of triangles,
