Three types of shirts sold at a store cost $9,$11, and $12.50. one day the store sells a total of 23 shirts and makes $243 in sales. twice as many shirts were sold for $12.50 than were sold for $11. write a system of equations to represent this situation.

The System of equations which represents the situations are;

Step-by-step explanation:

Let the shirt sold at cost $9 be x.

Let the shirt sold at cost $11 be y.

Let the shirt sold at cost $12.50 be z.

Given:

Twice as many shirts were sold for $12.50 than were sold for $11.

Hence it means that shirt sold at at cost $12.50 were 2 times more than shirt sold at cost $11.

Hence framing in equation we get;

Now Given:

Total Shirts sold = 23

But Total Shirts sold is sum of number of shirt sold at cost $9 and number of shirt sold at cost $11 and number of shirt sold at cost $12.50.

Hence framing in equation we get;

Also Given:

Total Money made by store = $243

But Total Money made by store is sum of number of shirt sold at cost $9 Multiplied by 9 and number of shirt sold at cost $11 multiplied by 11 and number of shirt sold at cost $12.50 multiplied by 12.50.

Framing in equation form we get;

Hence the System of equations which represents the situations are;

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this