PLEASE HELP ME which is the nth term of the indicated sequence? A1=7, d=-2 n=25

a. 55
b. -55
c. 41
d. -41

50 ! pls ! 12.  building codes regulate the steepness of stairs. homes must have steps that are at least 13 inches wide for each 8 inches that they rise.

a. discuss how to find the slope of the stairs.
b. describe how changing the width or height affects the steepness of the stairs.

The serenity and the mystic are sail boats. the serenity and the mystic start at the same point and travel away from each other in opposite directions. the serenity travels at 16 mph and the mystic travels at 19 mph. how far apart will they be in 3 hours?

Afair die is cast four times. calculate the probability of obtaining exactly two 6's round to the nearest tenth of a percent