The following set of ordered pairs is an example of direct variation, find the constant ratio between the variables. (hint: find k.)

(2, 4) (5, 10) (7, 14) (11, 22)

a. k=2
b. k=8
c. k=-2
d. k= 1/2

Simplify 4 square root of 2 end root plus 7 square root of 2 end root minus 3 square root of 2 . (1 point) 2 square root of 8 8 square root of 2 8 square root of 6 6 square root of 8

33% of college students say they use credit cards because of the rewards program. you randomly select 10 college students and ask each to name the reason he or she uses credit cards. find the probability that the number of college students who say they use credit cards because of the rewards program is (a) exactly two, (b) more than two, and (c) between two and five inclusive. if convenient, use technology to find the probabilities.

Which coefficient matrix represents a system of linear equations that has a unique solution ? options in photo*