Answer:
Expression:
Value of the expression when :
Step-by-step explanation:
Let's first focus on the expression: '6 more than twice a number'. Twice a number is the same as saying two times a number. Let's have that number be represented by . Twice a number would mean
, and 6 more than that would just be
.
We'll then plug in 5 for to get the value of the expressinn:
Two sevenths over two fifths = five over seven mile per hour
The unit rate is 5 over 7 miles per hour
<em><u>Solution:</u></em>
Given that, Suzanna walked two over seven of a mile in two over five of an hour
We have to find the unit rate in miles per hour
Unit rate means number of miles covered in 1 hour
From given information,
Two over seven of a mile in two over five of an hour
Which means,
To find for number of miles covered in 1 hour, divide the
Two sevenths over two fifths = five over seven mile per hour
Thus unit rate is 5 over 7 miles per hour