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Big Ideas Math Integrated I, 2016

BI

Big Ideas Math Integrated I, 2016 View details

3. Solving Inequalities Using Multiplication or Division

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Exercise 4 Page 67

Practice makes perfect

a Let's use division to solve the given inequalities! We can divide by 7 to isolate the x.

7x<-21

.LHS /7.<.RHS /7.

x<-3

b We can divide by 4 to isolate the x.

12≤4x

.LHS /4.≤.RHS /4.

3≤ x

c We can divide by -5 to isolate the x. Remember that we need to change the direction of the inequality sign when dividing by a negative.

10<-5x

Divide by -5 and flip inequality sign

-2>x

d We can divide by -3 to isolate the x. Remember that we need to change the direction of the inequality sign when dividing by a negative.

-3x≤0

Divide by -3 and flip inequality sign

x≥0

Subchapter links

Communicate Your Answer p.67

Monitoring Progress p.68-70

Exercises p.71-72