Maths - Algebraic formulae
What's is BIDMAS/BODMAS?
Shows the order of operations: Brackets Indices/pOwers Divide and Multiply Add and Subtract
What is a function?
System-defined formula which links an input value to an output value
What is an equation?
a mathematical statement that shows that two expressions are equal (it usually have one variable), (not always true)
What is a formula?
calculates a value using numeric elements in the flow (shows the relationship between two or more variables), (it's always true)
f(x) = 2x + 3 and g(x) = x² What is fg(x)?
g(4) = 4² = 16 fg(4) = f(16) = 2 × 16 + 3 = 35
Formula to work out force (Newtons)
F = ma m = mass (kg) a = acceleration (m/s²)
Rearrange the formula P = k/j to make k the subject of the formula
Pj = k
The formula for the surface area, A, of a closed box is given by: A = 2wb + 2wh + 2bh Rearrange this formula to make b the subject
(A - 2wh)/(2w + 2h)
Triangle area
(bh)/2
f(x) = 5x-4 Find f^-1(x)
2
Work out the value of d + (3c+ f)² when d = 2, c = -3 and f = 1
66
