Two less than the product of a number and -5 is -42

Two fire-lookout stations are 190 miles apart, with station a directly south of station b. both stations spot a fire. the bearing of the fire from station a is upper n 55 degrees upper e and the bearing of the fire from station b is upper s 60 degrees e. how far, to the nearest tenth of a mile, is the fire from each lookout station?

Which of the following expressions are equivalent ?

The roots of the function f(x) = x2 – 2x – 3 are shown. what is the missing number?