HELP ASAP! Solve.
{j+k=3j−k=7

Use the substitution method.
The solution is (5, −2).
There are an infinite number of solutions.
The solution is (8, 1).
There is no solution.

Ateacher asked his students to vote for an animal to be their class pet. five-eighteenths of the students voted for a rabbit, voted for a snake, and voted for a hamster. which statement is true? more students voted for a hamster than a snake. more students voted for a snake than a rabbit. more students voted for a rabbit than a hamster. more students voted for a snake than a hamster.

10x − 5y + 14 = 0 whats the answer pls

Express -5 2/5 as an improper fraction.