Write a paragraph that addresses the question: How is proportional reasoning used to create scale models?

Proportional Reasoning involves comparing items using ratios, and using multiplication to identify relationships that we can apply to a given situation. ... Multiply each of the side lengths by a/b to find the lengths of the corresponding sides that will be on the scale drawing.

(2x-1)(x+4)=0

Step-by-step explanation:

A random zero property of multiplication is taken to find the solution

(2x-1)(x+4)=0

consider a=2x-1 and b=x-4                                      a.b=0

                                                                           either a or b or both must be 0

equating both the equations

2x-1=0 or x=4=0        x-4=0

2x-1=0                         x=4  

2x=1

x=1/2

substitute the values of x in the main equation

[2(1/2)-1][(1/2)+4]=0