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Find x in the following equation: 4x + 8 -2x = 10

First combine the x-parts of the equation: 4x - 2x = 2x Next move the "number parts" so they are all on the same side: 2x + 8 = 10 ---> 2x = 2 Then divide through by 2 to move the 2 from the 2x ...
EM
Answered by Elizabeth M. • Maths tutor
5138 Views

Why is completing the square useful and how do you do it?

Completing the square is nice and easy. If you have an equasion of the form x 2 +ax+b=0 then simply rewrite the equasion in the form (x+a/2) 2 -(a/2) 2 +b=0. This may sound complicated but is we use numbers ...
EB
Answered by Edward B. • Maths tutor
4011 Views

Expand and simplify 3(x+4) - 2(4x+1)

3(x+4) - 2(4x+1)= 3x + 12 - 8x + 2= 3x - 8x + 12 - 2= -5x + 10
PP
Answered by Pioli P. • Maths tutor
6093 Views

Craig weighs 74.2 kg, Connie weighs 67.8 kg, and Chloe weighs 69.4 kg. What is the range of their weight?

6.4 kg
PP
Answered by Pioli P. • Maths tutor
4372 Views

What is the chain rule and how is it used?

The chain rule is used to find the derivative of an expression in the form h(f(x)) where you have a function in terms of a function of x for example: h(f(x)) = 2(3x+1)^3 where f(x) = 3x+1 In order to use the...
JB
Answered by Joseph B. • Maths tutor
3621 Views