Which expression is equivalent to 13 - (-21)13−(−21)13, minus, left parenthesis, minus, 21, right parenthesis?
choose 1
choose 1

(choice a)
a
-21-13−21−13minus, 21, minus, 13

(choice b)
b
-21+13−21+13minus, 21, plus, 13

(choice c)
c
-13+21−13+21minus, 13, plus, 21

(choice d)
d
13+2113+21

The numbers on a football field indicate 10 yard increments. you walk around the perimeter of a football field between the pylons. you walk a distance of 30623 yards. find the area and perimeter of the indicated regions. write your answers as mixed numbers, if necessary. a. one end zone: perimeter: yd area: yd2 b. the playing field (not including end zones): perimeter: yd area: yd2 c. the playing field (including end zones): perimeter: yd area: yd2

Parallelogram efgh is a rectangle. he = 6, and fe = 8. find ge: and find fj:

A. the following events are mutually exclusive: living in california and watching american idol. true or false b. the number of patients seen by an outpatient practice is an example of a discrete random variable. true or false c.the law of large numbers states that as the number of times an event experiment is conducted increases, the likelihood of the actual probability of an event approaching the theoretical probability decreases. true or false d. measuring the time it takes for patients to enter the operating room is an example of a continuous random variable. true or false