I can't tell what the numbers are on the first one but you got the second one right, and the last one would be different it would be 24 I believe.
Part A
The table does represent y as a function of x because each input (values of x) related to exactly one output. Refer to the diagram below.
Part B
We have
f(x) = 925x + 1000
f(24) = 925 (24) + 1000
f(24) = 23200
f(24) represent the value of renting for 24 months
Answer:
...
against the wind, an airplane travels 3640 km in 7 hours.
with the wind, the same plane travels 6000 km in 6hrs.
...
let speed of plane in still air be x mph
speed of wind be y mph.
..
t=d/r
..
against wind speed = x-y mph
with wond speed = x=y mph
...
3640/(x-y)=7
3640 = 7x-7y
/7
520=x-y.....................1
...
6000/x+y = 6
6000 = 6x+6y
/6
1000=x+y.....................2
...
Add (1) & (2)
2x=1520
/2
x=760 mph speed of plane in still air
...
plug value of x in 2
1000=760+y
100-760=y
240 = y
240 mph speed of wind
Answer:
A.30
Step-by-step explanation:
9 × 10^7 = 90 000 000
3 × 10^6 = 3 000 000
90 000 000 / 3 000 000 = 30