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the function f is such that f(x)=(2x-7)/4. Fnd f(-7) and the inverse of the function.

to find the first part we just need to plug in the value-7 in the expression for f replacing our independant value, x .f(-7)=(2*(-7)-7)/4 =(-14-7)/4 =-21/4to find the second part we need to interchange the p...
EG
Answered by Emily G. • Maths tutor
3438 Views

The equation of the line L1 is y=4x–8. The equation of the line L2 is 3y–12x+4=0. Show that L1 and L2 are parallel.

Parallel lines have the same gradient. The gradient of L1 is 4. For the gradient of L2: 3y=12x-4y=4x-4/3The gradient of L2 is also 4. Thus these lines are parallel. Explanation 1.Rearrange the equation to ma...
DP
Answered by Divya P. • Maths tutor
3964 Views

Solve for x the equation 1/(3x-6) +2/(x-2) =5

Firstly we would approach the question by looking at the question by attempting to group together the x terms to solve for x. By looking at the question we can see that the x terms are the denominators so we...
AS
Answered by Aswin S. • Maths tutor
3093 Views

Solve the simultaneous equations: x^2 + y^2 = 9 and x + y = 2

Firstly we need to realise that equation 1 (x^2 + y^2 = 9) does not factorise. So once realising this, we must rearrange equation 2 (x + y = 2) so that y = 2 - x. Now we substitute (y = 2 - x) into equation ...
SW
Answered by Sebastian W. • Maths tutor
5338 Views

Solve x^2 -7x+10

(x-5) (x-2)
MH
Answered by Max H. • Maths tutor
3067 Views