16-03-2015
Mathematics

Answered

PLEASE HELP: PART 1

Lisbeth runs on the track team. After practicing for 4 weeks, she lowers her time in the 800 meter run by 20 seconds.

Which expression can you use to calculate the average change in seconds per week?

A.-800÷4

B.-20÷4

C.20÷4

D.800÷4

Part 2

Evaluate the expression that represents the scenario.

_____________________

Verified Answer :

Anonymous Anonymous

17-03-2015

is B -20/4+-5
i hope it helps

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