1.Solve the following system by the substitution method 5x+3y=52  x=y+4. (whats the solution set if any)

2.Decide whether the given ordered pair is a solution of the given system.(3,-4)  for x+y= -1   4x+3y=14

3.A baseball team has home games on Friday and Sat. The two games together earn $3867.50 for the team. Fridays game generate 1072.50 less than sat game. how much money was taken in each game. Fridays..................................Saturday...............................

4.Solve the following system by the elimination method. x+y=8    8x-y=46    (solution set if any)

5.A race car travels at a speed of 100 miles per hour for x hours. Find an expression for the distance that the race car travels.......

6.Solve the following system by the substitution method. Check the solution(s).0.1X+0.3y= -0.4     0.8X-0.2y=4.6   (solution Set)

7.The point at which a company's costs equal its revenues is the  break-even point. C represents the cost, in dollars, of x units of a product and R represents the revenue, in dollars, from the sale of x units. Find the number of units that must be produced and sold in order to break even. That is, find the value of x for which C=R

  c=14X+56,000 and R=18X.   How many units must be produced and sold in order to break even?

8.Use the elimination method to solve the following system of equations. 5x+y= -20    7x-3y= -50 
9. Solve the following system by the elimination method. 1/3X+ y=10/3     1/6X +1/5Y=13/6