Which of these is a formula that can be used to determine the nth term of the arithmetic sequence 15, 27 39 51

an=3+12n

Step-by-step explanation:

The sequence is

15, 27, 39, 51

The first term: a 1 = 15

The common difference of this sequence : d = 27 − 15 = 12

The nth term of an arithmetic sequence is given by formula

an=a+(n−1)d

So a n for this sequence will be:

an = 15 +(n−1) 12

an =(15)+12n−12

an = 3+12n

60.9774

step-by-step explanation:

because when you add 47.6 plus 7.32 equals 54.92

and when you add .0574 + 6= 6.0574

and when you add 54.92 and 6.0574 you get the answer of 60.9774.

plzz mark brainlest last one got deleted. cause i didn't explain it but i did but i understand what the mod meant

answer: cos [   arcsin (3/5) - arccos (1/2) ] =

step-by-step explanation: × = 3/5 = 0.6--> x = 36.87 and x = 180 - 36.87 = 143.13 deg

cos y = 1/2 --> y = +- 60 deg a. cos (x - y) = cos (143.13 - 60) = cos 83,13  

=

0.12

b. cos (36.87 - 60) = cos (-23.23) = 0.92