Possible Answer:
Millimeter.
Step-by-step explanation:
Judging by the item in the question, a straw, millimeter is probably the correct measurement of the width of it.
Answer:
Equivalent expression is 
Step-by-step explanation:
Given expression is,

First step is to apply distributive property. The property states that,

Applying the property,

Simplifying,

Collecting like terms,

Combining the like terms,

Therefore, equivalent expression is 
First, convert 54 into a fraction.
It would be 54/1.
Now multiply 7/9 and 54/1 across; multiply the numerator by the numerator and the denominator by the denominator.
7 x 54 = 378
9 x 1 = 9
We get 378/9.
9 can go into 378 exactly 42 times.
So, 7/9 x 54 = 42.
1. Yes because the first ratio would be 1:5 and the second would be 1:5 because you would divide the first one by 4 and the second by 3
2. And then by would be the same