Write a system of equations to describe the situation below, solve using elimination, and fill in the blanks
To keep in shape, Nicholas exercises at a track near his home. He requires 34 minutes to do 4
laps running and 6 laps walking, In contrast, he requires 44 minutes to do 4 laps running and
8 laps walking, Assuming he maintains a consistent pace while running and while walking,
how long does Nicholas take to complete a lap?
Nicholas takes
minutes to run a lap and minutes to walk a lap.

Atechnician compares repair costs for two types of microwave ovens (type i and type ii). he believes that the repair cost for type i ovens is greater than the repair cost for type ii ovens. a sample of 6767 type i ovens has a mean repair cost of $79.79$⁢79.79. the population standard deviation for the repair of type i ovens is known to be $19.18$⁢19.18. a sample of 5555 type ii ovens has a mean repair cost of $75.24$⁢75.24. the population standard deviation for the repair of type ii ovens is known to be $21.40$⁢21.40. conduct a hypothesis test of the technician's claim at the 0.050.05 level of significance. let μ1μ1 be the true mean repair cost for type i ovens and μ2μ2 be the true mean repair cost for type ii ovens. step 2 of 4 : compute the value of the test statistic. round your answer to two decimal places.