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12. Delilah is going to college in the fall. She
needs to drive from one city to another.
Within the city limits she drives at a speed of
50 km/h. Outside the city, she drives at a
speed of 100 km/h. The trip to the campus is
200 km and takes 2.4 h.
a) Let x represent the distance Delilah
travels at 50 km/h. Let y be the distance
she travels at 100 km/h. Write a system
of linear equations to represent this
situation.
b) How far does Delilah drive at each speed?

The holiday party will cost $160 if 8 people attend.if there are 40 people who attend the party, how much will the holiday party cost

If your score on your next statistics test is converted to a z score, which of these z scores would you prefer: minus2.00, minus1.00, 0, 1.00, 2.00? why? a. the z score of 2.00 is most preferable because it is 2.00 standard deviations above the mean and would correspond to the highest of the five different possible test scores. b. the z score of 0 is most preferable because it corresponds to a test score equal to the mean. c. the z score of minus2.00 is most preferable because it is 2.00 standard deviations below the mean and would correspond to the highest of the five different possible test scores. d. the z score of minus1.00 is most preferable because it is 1.00 standard deviation below the mean and would correspond to an above average

The scatter plot shows the number of animal cells clara examined in a laboratory in different months: plot ordered pairs 1, 20 and 2, 60 and 3,100 and 4, 140 and 5, 180 what is the approximate predicted number of animal cells clara examined in the 9th month?