Answer:
13197
Step-by-step explanation:
You have to do 24.9*2 and then find that percent of 26500
S = d/t
st = d
t = d/s
The time going is t1.
The time returning is t2.
The total time is 4 hours, so we have t1 + t2 = 4
The speed of the current is c.
The speed going is 9 + c.
The speed returning is 9 - c.
t1 = 16/(9 + c)
t2 = 16/(9 - c)
t1 + t2 = 16/(9 + c) + 16/(9 - c)
4 = 16/(9 - c) + 16/(9 + c)
1 = 4/(9 - c) + 4/(9 + c)
(9 + c)(9 - c) = 4(9 - c) + 4(9 + c)
81 - c^2 = 36 - 4c + 36 + 4c
81 - c^2 = 72
c^2 = 9
c^2 - 9 = 0
(c + 3)(c - 3) = 0
c + 3 = 0 or c - 3 = 0
c = -3 or c = 3
We discard the negative answer, and we get c = 3.
The speed of the current is 3 mph.
The ratio between the perimeters of two similar polygons is the same as the ratio between the corresponding sides.
12:15=30:x
12x=15*30
12x=450
x=450/12=37.5
37.5 is the answer.
Answer:
Step-by-step explanation:
7y = -6x - 19
y = -6/7x - 19/7
perp. 7/6
y - 7 = 7/6(x + 6)
y - 7 = 7/6x + 7
y = 7/6x + 14
The Pythagorean theorem is used for this
.. diagonal = √(120² +62²) = √18244 ≈ 135.1 . . . . yards
