# Y9 algebra 1 Inequalities

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### Text of Y9 algebra 1 Inequalities

• Inequalities

Bytheendofthislessonyouwillbeableto:

Solveinequalitiesalgebraically.

• inequalities

• nislessthan3

xisgreaterthanorequalto8

aislessthanorequalto5

n

• isequivalentto

xisgreaterthan3butlessthan8

aisgreaterthan4butlessthanorequalto9

3

• Representtheinequalitiesonthenumberline.

• Representtheinequalitiesonthenumberline.

• +7 +7

3 3

• Inaninequality,youcanmultiplybythesamepositivenumberbothsidesandtheinequalityremainstrue.

x3 x3

• Inaninequality,youcandividebythesamepositivenumberbothsidesandtheinequalityremainstrue.

2 2

• Whathappensifyoumultiplytheinequalitybyanegativenumber?

x(1) x(1)

• Whathappensifyoudividetheinequalitybyanegativenumber?

(2) (2)

• Whenyoumultiplyordivideaninequalitybyanegativenumber,thesignmustbechangedaround.

• Solvetheinequalityandrepresentthesolutiononanumberline.

15+3x

• Solvetheinequalityandrepresentthesolutiononanumberline.

187x+4

• Solvetheinequalityandrepresentthesolutiononanumberline.

194x3

• Solvetheinequalityandrepresentthesolutiononanumberline.

45x2x3

• 3(x1)
• 2(x1)>x7

• SolvefromBook:pages62&63

Page 1Page 2Page 3Page 4Page 5Page 6Page 7Page 8Page 9Page 10Page 11Page 12Page 13Page 14Page 15Page 16Page 17Page 18Page 19Page 20Page 21Page 22Page 23

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