3
Do you mean: 4x+7y = 47 and 5x-4y = -5 Then the solutions to the simultaneous equations are: x = 3 and y = 5
4X + 7Y = 60 -4X + 7Y = - 4 -----------------------+ 14Y = 56 Y = 4 --------- insert back into one of these equations to find X 4X + 7(4) = 60 4X + 28 = 60 4X = 32 X = 8 ------------check 4(8) + 7(4) = 60 32 + 28 = 60 60 = 60 ----------------checks, now second equation -4(8) + 7(4) = -4 -32 + 28 = -4 -4 = -4 --------------checks solution set. X = 8 Y = 4 (8,4)
3x+y = 10 y = x-2 Substitute the value of y into the top equation: 3x+x-2 = 10 => 4x = 10+2 => 4x = 12 => x = 3 Substitute the value of x into the original equations to find the value of y: So: x = 3 and y = 1
4x to the sixth can be expanded to (4x * 4x * 4x)(4x * 4x * 4x) or (4x to the third)(4x to the third) the square root of the above would be 4x to the third
Given the ordered pair (3, y), what value of ywould make the ordered pair a solution of the equation 4x − 2y = 24?12
The inverse of an ordered pair (a,b) is the pair (b,a). So you simply switch the order.
The ordered pair is (6, 3).
3
16
4x+6y=62 -6x+6y=-18 what is the ordered pair
(1,-2)
If you mean: 4x -4y = 12 and -7x +4y = -36 then x = 8 and y = 5
It is the infinite set of points of the form [x, (4x+9)/7] for all value of x in its domain.
(5,3)
The lines intersect at (3, 5)
x = 1 and y = 6 so the lines intersect at the point (1, 6)