A local racewalking club is hosting a race. They collected data about their members' speeds to determine how long volunteers will need to help at water stops along the route. By calculating the range of the data, the club can determine when the first and last athletes will approach each water stop. Which dot plot displays a range of 1.8?

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step-by-step explanation:

make sure you have version 2.50

try looking in the very back of the book : )

step-by-step explanation:

you can download it here

option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,