S3 UB flashcards

Question 1

Simultaneous Equations

Answer 1

Two equations in two unknowns that can be solved at the same time

Question 2

First step in solving simultaneous equations

Answer 2

Multiply either or both of the equations to get matching coefficients with opposite signs on 1 of the variables

Question 3

Similarity

Answer 3

When shapes are enlargements or reductions of one another

Question 4

First step in solving similarity problems

Answer 4

Find the length scale factor as new length/old length, with the ‘new’ shape being the shape we are trying to find information out about

Question 5

Area scale factor

Answer 5

the square of the length scale factor

Question 6

Volume scale factor

Answer 6

the cube of the length scale factor

Question 7

Finding the gradient and y-intercept of a line from its equation

Answer 7

Rearrange into y = mx + c form, and read off: m is the gradient, and (0,c) is the co-ordinate of the y-intercept

Question 8

Find the gradient between two points

Answer 8

m = (y2-y1)/(x2-x1)