Idon't understand how these work. can you me ?

If 1 is divided by the sum of y& 4. the result is equal to 3 divided by 4 .find the value of m?

Find the number of real number solutions for the equation. x2 + 5x + 7 = 0 0 cannot be determined 1 2

Li buys supplies so he can make and sell key chains. he begins to make a profit only after he sells 4 key chains. what point on the graph makes the most sense in this situation?