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Change the subject of the formula F=(t^2+4b)/c to b.

b = (Fc-t^2)/4
MH
Answered by Mayez H. • Maths tutor
6740 Views

A line passes through the points (-2,1) and (4,4). Find the equation of the line in the form y = mx + c

In the form y = mx + c, m stands for the slope (or gradient) of the line, and c for its y-intercept. Since we are given two points that are on the line, we can figure out its slope by looking at the vertical...
FB
Answered by Filip B. • Maths tutor
4267 Views

Why does the discriminant b^2-4ac determine the number of roots of the quadratic equation ax^2+bx+c=0?

The rule for the discriminant: if b^2-4ac>0 then the quadratic has two roots if b^2-4ac=0 then the quadratic has one root if b^2-4ac<0 then the quadratic has no rootsRecall that the formula for solving...
DG
9766 Views

200 pupils are taking a school trip. Some are flying, some are taking the bus. There are three times as many boys going as girls. One third of the boys going are flying. How many boys are getting the bus?

x is number of boys. y is number of girlsx + y = 200x = 3y4y = 200y = 50x = 1502/3 * 150 = 100 boys getting the bus
JC
Answered by Jonty C. • Maths tutor
2886 Views

How do I effectively annotate my texts for later study?

This seems like quite a simple question with an obvious solution, yet when I sat my GCSE's I remember struggling to determine what was important in a text to annotate or underline for future reference. Conse...
TR
4452 Views