Translate the word phrase into a math expression. 1 less than a number.

A. n + 1
B. 15 ÷ n
C. 1−n
D. n−1

its d cuz im a big brain :)

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

in simplified version   it would be x ≤-4

step-by-step explanation:

multiply each term in x ≤-4 by -1