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marysya [2.9K]
3 years ago
13

Solve 4w − 7k = 28 for k. Show your work.

Mathematics
2 answers:
SOVA2 [1]3 years ago
8 0
4w-7k=28 
Move variable to the right to get -7k=28-4w
Divide both sides by -7 
k= -4+4/7w
kari74 [83]3 years ago
8 0
The answer is k= -4, you have to multiply 4 with 0

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Answer: year 2194



Explanation:



1) Model the jump of the women:


i) initial jump = 70.0 in


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iii) equation: h = 70.0(1 +0.0048)ⁿ


2) Model the jump of the men:


i) initial jump 86.5 inches.


ii) increase rate, 0.4%.


iii) equation: h = 86.5 (1 + 0.004)ⁿ


3) Equal the two equations (h = h) to find when the jumps will be equal:


i) 70.0(1 +0.0048)ⁿ = 86.5 (1 + 0.004)ⁿ


ii) 70.0(1.0048)ⁿ = 86.5 (1.004)ⁿ


ii) [1.0048ⁿ / 1.004ⁿ] = 86.5/70.0


iii) [1.0048/ 1.0040]ⁿ = 86.5/70.0


iv) n log (1.0048 / 1.0040) = log ( 86.5/70)


v) n = log (86.5/70) / log (1.0048/1.0040) ≈ 266


3) year = 1928 + 266 = 2194


That is in the year 2194

8 0
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Answer:

See below.

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