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Find the nth term in the series: 3, 7, 11, 15, 19

Find the difference between each value. 7-3, 11-7 ... For this series the difference is 4. The nth term is then 4n + or - a constant. The series is 3, 7, 11.. each of these is 1 below a multiple of 4. 4 1- 1...
HW
Answered by Hermione W. • Maths tutor
34193 Views

How to find the gradient of a line?

The gradient, m, is the change in the y coordinates over the change in the x coordinates. M=(y 2 - y 1 ) / ( x 2 - x 1 )
HW
Answered by Hermione W. • Maths tutor
3637 Views

express (2x^2-3x-5)/(x^2+6x+5) in the form (ax+b)/(cx+d)

(2x-5)/(x+5)
MB
Answered by Matthew B. • Maths tutor
9691 Views

Find x when 2x^2-4x-6=0

Factorise 2x 2 -4x-6=0 2(x 2 -2-3)=0 -> 2(x+1)(x-3)=0 split factors up 2=0 , (x+1)=0 and (x-3)=0 x+1=0 -> x = -1 x-3=0 -> x = 3
IG
Answered by India G. • Maths tutor
3436 Views

How do I know when to use sin, cos or tan?

Check that your triangle is a right-angled triangle. Remember, you can only use pythagoras theorem or SOHCAHTOA on right-angled triangles. Label the sides O, H and A: opposite (the angle), hypotenuse (longes...
CS
Answered by Camilla S. • Maths tutor
12259 Views