Answer:
B 
Step-by-step explanation:
since last years income is 
, and 
= 1, them 
= s.
adding 
to would be equal to , which is option B.
Answer:
????????????????????????????????
3237
× 78
_____
25655
+226590
________
252,245
I don't see anything, but any line that doensnt have the right angle sign is not perpendicular.
The expression for the cost function is cost=60y.
We have given that,
a cup of tea costs 60p.
We have to determine the cost function.
<h3>What is the cost function?</h3>
In mathematical optimization and decision theory, a loss function or cost function is a function that maps an event or values of one or more variables onto a real number intuitively representing some cost associated with the event. An optimization problem seeks to minimize a loss function.
Cost=no of cups(price for one cup)
cost=60y
Therefore the expression for the cost function is cost=60y.
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