According to a survey, the average american person watches tv for 3 hours per week. to test if the amount of tv in new york city is less than the national average, a researcher decides to do a hypothesis test, at a 10% significance level. she surveys 26 new yorkers randomly and asks them about their amount of tv each week, on average. from the data, the sample mean time is 2.5 hours per week, and the sample standard deviation (s) is 1.1 hours.

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when a figure, such as triangle (xyz) is reflected over the line y = x to create x'y'z' the x-coordinates and y-coordinates of the original image (pre-image) will be reversed for the image. (e.g., (x, y) > (y, x)) this means that the pre-image position of the x- and y-coordinates switch places which in turn provides a mirror like image of the original xyz.  

i notice that when i draw a line segment from x to x', that the points are parallel from each other -- they are exactly across from each other and do not intersect with any other points.  

yes, think i would see the same characteristic if you drew the line segment connecting y with the reflecting line and then y' with the reflecting line because of the essence of reflections. because it is a mirror image, each point was effected the same way which leads me to conclude that they same would apply to y and y'.

b. 153 students do not participate in sports and seventy-five 12th graders were surveyed

it is 28 degrees colder in detroit than philadelphia.

step-by-step explanation:

what number adds to 21

-7 + ? = 21

-7 + 28 = 21

hope it