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Solve the simultaneous equations 5x + y = 21 and x- 3y = 9

There are different ways to approach solving a simultaneous equation question. For this one I recommend using substitution for this one where you insert one equation into the other. First take the equation x...
GB
Answered by George B. • Maths tutor
3552 Views

Solve x^2+10x-3=0 by completing the square, simplify your answer.

x 2 +10x-3=0(x+5) 2 -(5) 2 -3=0 (half the 'x' coefficient and put it in the bracket with x to be squared, then take away that new number squared followed by the original constant)(x+5) 2 -25-3=0 (square the ...
TD
Answered by Tutor575114 D. • Maths tutor
5068 Views

If you go 38 hours without sleeping starting at 8 am, and then you sleep for the next 11 hours, what time will it be when you wake up?

9am
JD
Answered by Joshua D. • Maths tutor
1689 Views

find the integral of y=x^2 +sin^2(x) with respect to x between the limits 0 and pi

intergal 0 pi (x^2 + sin^2(x))dx = integral 0 pi (x^2 + 1/2 - cos(2x)/2)dx since sin^2(x) + cos^2(x) = 1cos^2(x) - sin^2(x) = cos(2x)2sin^2(x) = 1 - cos(2x)thereforeintegral 0 pi (x^2 +sin^2(x))dx = [(x^3)/3...
Answered by • Maths tutor
3630 Views

How would you simplify this: ((4x+1)/4)+((1-3x)/3)

You must manipulate the fractions so that they both have the same denominator. To do this, multiply the first fraction by 3 and the second by 4 so that they both have the denominator 12. The problem can then...
IH
Answered by Isobel H. • Maths tutor
2985 Views