7B+5Y=487B+1Y=40Subtracting Eqn 2 from 1 we get 4Y=8so Y = $2 and X=$38/7
total distance travelled=72+69=141
time taken in hours for journey= (48/60)h + (69/60)= 1.95 h
average speed=141km/1.95h= 72.3km/h (3 sf)
C. The sun of the areas of its exterior surfaces is the correct answer.
Answer:
x=-7
Step-by-step explanation:
2x-5=5x+16
(2x-5x)=(5+16)
-3x=21
21/(-3)=-7
