Say that a and b are integers, a ≡ 11 (mod 19), and b ≡ 3 (mod 19). find the integer c with 0 ≤ c ≤ 18 such that a. c ≡ 13a (mod 19).
b. c ≡ 8b (mod 19).
c. c ≡ a − b (mod 19).
d. c ≡ 7a + 3b (mod 19).
e. c ≡ 2a2 + 3b2 (mod 19). f ) c ≡ a3 + 4b3 (mod 19).

Omar is going on a road trip! the car rental company offers him two types of cars. each car has a fixed price, but he also needs to consider the cost of fuel. the first car costs $90 to rent, and because of its fuel consumption rate, there's an additional cost of s0.50 per kilometer driven.

What are two numbers that add up to -9 and multiply to -10 best answer gets branliest and 100 extra points

Harry is at the depot in dover and has deliveries to make in edinburgh, glasgow and aberdeen. from dover which of the deliveries is the shortest distance?