If two linear equations, y = x + 4 and y = 2x + c, intersect at x = 1, find c.

Draw the two equations, indicating the point of intersections (whiteboard).If the lines intersect at x=1, then at that point the y values of each equation are equivalent. Therefore, x+ 4 = 2x + c.Inputting x=1, (1)+4 = 2(1) + c, which is the same as 5 = 2 + cThe answer follows as c = 3.

Answered by Tutor27510 D. Maths tutor

2158 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

Solve: x^2 – x – 12 = 0


z = 3x + 5y, if x = 7 and z = 41, what is 2y?


2x + y = 24, x - y = 6


Find the length of the longest side in this triangle.


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo
Cookie Preferences