True or False, and explain briefly:

(a) If you add 7 to each entry on a list, that adds 7 to the average.
(b) Ifyouadd7toeachentryonalist, that adds 7 tot he SD.
(c) If you double each entry on a list, that doubles the average.
(d) If you double each entry on a list, that doubles the SD.
(e) If you change the sign of each entry on a list, that changes the sign of the average.
(f) If you change the sign of each entry on a list, that changes the sign of the SD.

Explain step-by-step how to simplify -5(2x – 3y + 6z – 10).

Abc will undergo two transformations to give aa'b'c' which pair of transformations will give a different image of aabc if the order of the transformations is reversed? a. a rotation 90' counterclockwise about the origin followed by a reflection across the y-axis b a translation 5 units down followed by a translation 4 units to the right c. a reflection across the x-axis followed by a reflection across the y-axis a rotation 180'clockwise about the ongin followed by a reflection across the y-axis reset next 2 omentum all rights reserved o atk me anything o o e

The u-drive rent-a-truck company plans to spend $13 million on 320 new vehicles. each commercial van will cost $25 comma 000, each small truck $50 comma 000, and each large truck  $80 comma 000. past experience shows that they need twice as many vans as small trucks. how many of each type of vehicle can they buy?