I am gonna use substitution method. Solve for y in first equation, y + 4x = 8 y = 8 -4x Put the above y value in second equation, 5x + 2y = 13 5x + 2(8-4x) = 13 5x + 16 - 8x = 13 -3x = 13-16 -3x = -3 x = -3/-3 x = 1/1 = 1 Put the x value in first equation, y + 4x = 8 y + 4(1) = 8 y = 8 - 4 y = 4 Hence, the solution is (1,4)
To find the mean you have to add all the numbers and divide by how many there are. 1) 6.6 2) 180.8 To find the median you have to list all the numbers from lowest to biggest and the middle number is the median. 3) 19 4) 78