# MTH3: FORMULAE

##### This unit dwells on formalae,which is frequently expressed in algebraic symbols, its also about substitution, and functions.

FORMULAE

Building a formulae

Example

1. In the figure , ABC is a straight line the angles at B are p0 , q0, q0 as shown statethe fomular for p in terms of q. 1. Trees are planted in a rectangular field measures 2 metres by metres. Each tree is allowed to occupy an area of 15m2. If there n trees. Complete the fomulae n= —- The answer isunrealistic because you can’t have a fraction of trees A VIDEO ABOUT FORMALAE INVOLVING FRACTIONS

Surface area, 5cm2 in erms of h  1. In the figure the square ABCD has sides of length 10cm and CX = CV = Xcm.   A VIDEO ABOUT FORMALAES

SUBSTITUTION

1. A metal bar has a length , a cm when its temperature is raised f 0C its new length , at cm is given by at where c is the coefficient of linear expansion. Find C if a = 87.40              A VIDEO ABOUT FORMULAE AND SUBSTITUTION

FUNCTIONS

A function is a mapping in which every object has one and only one image. Notation;-

Example    ### ASSIGNMENT : FORMULAE ASSIGNMENTMARKS : 10  DURATION : 30 minutes

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