ASAP
Solve.

{m+n=5
(m−n=3

Use the substitution method.

There are an infinite number of solutions.

The solution is (4, 1).

There is no solution.

The solution is (2, −1).

Add 1/7 + -1/7 your answer should be reduced to its smallest form and should not be an improper fraction

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²

Kyle and elijah are planning a road trip to california. their car travels 3/4 of a mile per min if they did not stop driving, how many miles could kyle and elijah drive in a whole day? ? 1 day = 24 hours. plzzz i will give you 100 points