You have $11.40 to buy drink boxes for the football team. Each drink box costs $0.40. How many drink boxes can you buy? Shoul
d you expect to get change when you pay for the drink boxes? If so, how much?
I can buy ___ drink boxes.
Should you expect to get change? Select the correct choice below and, if necessary, fill in the answer boxes to complete your choice.
A. I will pay $____ nothing and get $____ nothing back for the nothing of a drink box I can't buy.
(Type whole numbers or decimals.)
B. I do not expect change.
I can buy ___ drink boxes.
Should you expect to get change? Select the correct choice below and, if necessary, fill in the answer boxes to complete your choice.
A. I will pay $____ nothing and get $____ nothing back for the nothing of a drink box I can't buy.
(Type whole numbers or decimals.)
B. I do not expect change.
2 answers:
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Answer:
Step-by-step explanation:
We have the following system
The number of solutions depend on the determinant of the matrix of the system. If the determinant is different from 0, then it has one unique solution, if it 0 then it has infinite solutions.
Note that the determinant of a matrix
is ad-bc. So in our case we have 4*1-(-2)*2 = 8 which is not 0. Then the system has an unique solution.