Which of the following is x=-5 a solution a) x+10=-5 b)-x^2 +50=25 c) [2x]=10 d) x is less than 10 e) 2x is less than 10

Determine if the solution set for the system of equations shown is the empty set, contains one point or is infinite. x + y = 5 x + y = 7 {} 1 solution infinite

How to do a maths question? i have a mock

Write a problem for the equation 0.5n=12.5. then solve the equation and write the answer to your problem.