In this case, 7 is being added to the odometer which already reads 78. If you add 7 to 78, you get 85. Meaning y = 85!
Answer:
f(x) = (x +1)/(x -1)
Step-by-step explanation:
Let f(x) = y. We want to find y such that ...
g(y) = x
(y +1)/(y -1) = x
y +1 = xy -x . . . . . . multiply by y-1
y -xy = -x -1 . . . . . . add -1 -xy
y(x -1) = x +1 . . . . . . multiply by -1 and factor out y
y = (x +1)/(x -1) . . . . divide by the coefficient of y
Then ...
f(x) = (x +1)/(x -1)
_____
<em>Check</em>
g(f(x)) = ((x +1)/(x -1) +1)/((x +1)/(x -1) -1)
= ((x +1 +x -1)/(x -1)) / ((x +1 -x +1)/(x -1))
= 2x/2
= x
Answer:
about 5 years
Step-by-step explanation:
year 1)500*0.03= 15
year 2)515*0.03= 15.45+515=530.45
year 3)530.45*0.03= 15.91+530.45=546.36
year 4)546.36*0.03=16.39+546.36=562.75
year 5)562.75*0.03=16.88+562.75=579.63
Answer:
8 cm and 9 cm
Step-by-step explanation:
This is the answer because:
1) The other two sides have to equal somethinng that is bigger than 13.
2) 5 cm + 8 cm = 13 cm, therefore, 5 cm and 8 cm is not the correct answer.
3) 6 cm + 7 cm = 13 cm, therefore, 6 cm and 7 cm is not the correct answer.
4) 7 cm + 2 cm = 9 cm, therefore, 7 cm and 2 cm is not the correct answer.
5) Finally, 8 cm + 9 cm = 17 cm, therefore, it is the correct answer since it has a bigger value than 13.
Hope this helps! :D
Answer:
x ≤ 17
Step-by-step explanation:
Pick up fee = 2.80
Cost per mile = 1.25
Total cost = $24.05
Number of miles ride, x
Pickup fee + mile per ride * number of ride ≤ total cost
2.80 + 1.25x ≤ 24.05
1.25x ≤ 24.05 - 2.80
1.25x ≤ 21.25
x ≤ 17
Number one of miles ride x ≤ 17
