WILL GIVE BRAINLIEST TO 1st ANSWER PLEASE HELP! Which set of pairs is linear and non-linear

1. (2,1), (3,4), (5,6), (2, 7)

2 (3,1), (−3, 1), (0,1), (5,1)

3 (1,1), (2,2), (3,3), (4,4)

4. (4,1), (6, 7), (8, 9), (4,7)

(2,4), (2,5), (2,6), (2,8)

What is the absolute value of the complex number -4-sqrt2i

Peter measures the angles in a triangle. he finds that the angles are 95, 10 and 75. is he correct? explain your answer

At a local museum, the total price for one adult and one child is $11. mrs. smith paid for herself and her three children. she spent $19. record the system of equations to be solved and then find the price of an adult and child ticket using either elimination or substitution.