The answer is B. 9 - x. I hope this helps!
2.5 kilometres is 2500 meters as 1km is 1000m
2500-2050 = 450m
as david is the one that rode 2.5 kilometres he rode further by 450 meters
A = LW
A = 320
L = 5W
320 = W(5W)
320 = 5W^2
320/5 = W^2
64 = W^2
sqrt 64 = W
8 = W
L = 5W
L = 5(8)
L = 40
so the length (L) = 40 cm and the width (W) = 8 cm
P = 2(L + W)
P = 2(40 + 8)
P = 2(48)
P = 96 <=====
For an explicit formula in its simplified form, we must evaluate the first two terms.
For

,

, and

. We see that the common difference is

, and

, so we write,

.
The correct answer is
B.
Answer:
120 children and 388 adults bought tickets for the swimming pool. Explanation: Create two simultanous equations:.