Mr. McKay wrote an algebra test with a total of 15 questions consisting of multiple choice and short response style questions. Multiple choice questions,
X, were worth 5 points each and short response questions, y, were worth 10
points each. There were 100 total possible points on the test. Write and graph
a system of linear equations for this situation to determine the number of
each type of question.

correct answer:

i^31 = -i

step-by-step explanation:

i believe its "c" because all of the other options include a but it could be d because there is a way of financing with cash at certain places but its uncommon.

step-by-step explanation:

to find if any function is an inverse of the other, put the first equation in as x in the next one. then simplify and solve. if at the end you get the statement y = x, then it is an inverse. if you get anything else, it is not.