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1988 WAEC Mathematics Theory Illustrate the following on graph paper and shade the region which satisfies all the three...

Mathematics
WAEC 1988

Illustrate the following on graph paper and shade the region which satisfies all the three inequalities at the same time :

\(- x + 5y \leq 10 ; 3x - 4y \leq 8\) and \(x > -1\).

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Explanation

Draw the table of value such that \(-x + 5y \leq 10 \implies -x + 5y = 10\)

\(\implies 5y = 10 + x \)

\(y = 2 + \frac{x}{5}\)

and \(3x - 4y \leq 8 \implies 3x - 4y = 8\)

\(y = -2 + \frac{3x}{4}\)

Table of value for \(-x + 5y = 10\)

x -4 0 4
y 1.2 2 2.8

Table of value for \(3x - 4y = 8\)

x -4 0 4
y -5 -2 1

 

 


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WAEC offline past questions - with all answers and explanations in one app - Download for free
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
WAEC offline past questions - with all answers and explanations in one app - Download for free