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Solve the simultaneous equations: 3x-y=13, 2x+y=12

To solve these simultaneous equations we first need to eliminate one variable (the x or the y). For this we will need the coefficients (numbers in front of the variables) to be equal or opposite on one varia...
ED
Answered by Ellie D. • Maths tutor
6110 Views

Solve algebraically the simultaneous equations: 6x=5-2y 12.5=3x+3y

Rearrange both equations into the form ax + by = c. 3x+3y = 12.5 6x +2y = 5. 2) Make either x or y have the same coefficient in each equation. In this case we use x, to do this we multiply the first equation...
LW
Answered by Laura W. • Maths tutor
3306 Views

Expand and simplify (x – 9)(x + 2)

x^2 - 7x - 18
JB
Answered by JOSEPH B. • Maths tutor
7497 Views

Find the coordinates of the mid-point AB where A (-3,-3) and B (1,3)

X coordinates = (-3+1)/2 = (-2)/2 = - 1Y coordinates = (-3+3)/2 = (0) /2 = 0 Coordinates of the midpoint = (x,y) = (-1,0) If they were struggling to visualise it/to avoid simple mistakes, I would suggest qui...
EW
Answered by Edward W. • Maths tutor
3417 Views

h^2=25. solve this quadratic equation to find h.

h 2 = 25So firstly, we must square root each side of the equation.(square root) h 2 = (square root)25.so... h= (square root)25.h=5. or h=-5.
HS
Answered by Helen S. • Maths tutor
4112 Views