7 Find the values of k such that the straight line y = 2x +k meets the curve with equation
x2 + 2xy + 2y2 = 5 exactly once.

What is x and y (use substitution? ) 5x+3y=38 and y=3x+8?

Acollection of coins has value of 64 cents. there are two more nickels than dimes and three times as many pennies as dimes in this collection. how many of each kind of coin are in the collection?

If we pull out the middle player of team a and the fourth player of the team b. what will be the force of team a and team b? what is their sum of forces