A shop sells posters in different sizes. The height (h) and width (w) of each poster are linked by the formula h=2.5w -5 What is the width of a poster that is 10 cm high?

6 cm

Step-by-step explanation:

Hi, to answer this question we simply have to substitute h=10 (height) in the formula given:

h=2.5w -5  

Replacing:

10= 2.5w-5

Solving for w (width)

10+5=2.5w

15 =2.5w

15/2.5=w

w =6 cm

In conclusion,  the width of a poster that is 10 cm high is 6 cm.

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