Is (5, 4) a solution to this system of equations?
2x + 3y = 23
y + x = 9

In the 30-60-90 triangle below side s has a length of and side r has a length

When x = 3 and y = 5, by how much does the value of 3x2 – 2y exceed the value of 2x2 – 3y ?

Your friend uses c=50p to find the total cost, c, for the people, p, entering a local amusement park what is the unit rate and what does it represent in the context of the situation?