Answer:
The numbers are 5 and -4
Step-by-step explanation:
let the numbers be =x and y
x+y=1—eqn 1
x-y=9—eqn 2
Add both equations
2x=10
x=5
Plug x=5 into eqn 2
5-y=9
5-9=y
y=-4
Answer:
battery costs: 0.39...............
Answer:
70 Km/ h
Step-by-step explanation:
speed =
=
= 70 Km/h