Answer:

Step-by-step explanation:
Given

Required
Complete the square
Rewrite so that
has 1 coefficient

Take half of the coefficient of x

Square the result


Add and subtract the result in the bracket

Expand the bracket to remove -4


Expand the bracket

Factorize

Factor out x - 2

Express as square

Let the cost of one sheep and one cow be x and y respectively.
Therefore,
5x+5y=129
10x+17y =177
Solving the two equations,
Multiply the first equation by 2 and subtract the second from the results;
10x+10y = 258
10x+17y = 177
0x-7y = 81 => y= $-11.57 (cannot be a negative value). The details of the question need to be checked.
Now,
5x+5y = 129 => 5x-57.86 =129=>5x = 186.86 => x= $37.37
Answer:
148.5
Step-by-step explanation:
times all
Use the formula (y,-x)
a: (1,1)
b’(-2,-1)
c’(-4,0)