The time is took Tayna to complete different sets of math problems varied directly with the number of problems in the set Tayna's data is shown in the table. If x = time, and y = the number of problems in the set, which equation models Tayna's direct variation A. y = 12x
B. y = 1.2x
C. y = x divided by 12
D. y = x divided by 1.2

C

Step-by-step explanation:

time is directly proportional to the number of problems in the set

=> x = ky

k = constant of proportionality

when k = 12

x = 12y

by making y the subject, we divide both sides by 12

=> y = x/12

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation: