|5x + 10| - 15 = 20 x = 9 and x = -9 x = 5 & x = -9 x = 5 & x = -2 x = -1 & x = -3

First, let's isolate the absolute value:

|5x + 10| = 35

Now open up the absolute values:

5x + 10 = 35

5x + 10 = -35

5x = 25

5x = -45

x = 5

x = -9

Option B. is the answer

since the airplane is moving with constant speed then the distance travelled can be calculated by x=u*t

in km/h would be:

x=640*3.5=2.240 km

in m/s would be:

u=640 km/h= 640.000 m/h =640.000/ 3600 m/s =177.8 m/s

t= 3.5 h= 3.5 * 3600 s=12.600 s

then x=u*t= 177.8*12.600= 2.240.280 m

answer: a.

step-by-step explanation: the answer is a. because, you need to converge the fractions to find a solution.