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Volgvan
3 years ago
7

Challenge:A swimming pool has two inflows and one oulow. Determine their maximal flowspeed in swimming pools per hour if you kno

w the following:Inially, the pool was full.Then, the oulow and one of the inflows were open for minutes.Aerwards, the pool was full.Next, both inflows and the oulow were open for minutes.Aerwards, of the pool was filled with water.Finally, the operator noced that the oulow was open the whole me so he could not fill upthe pool as fast as possible. He closed the oulow and in the next minutes, the pool became full.
Mathematics
1 answer:
insens350 [35]3 years ago
6 0

Answer:

Swimming is a lot of fun, but drowning is a real danger. Even kids who know how to swim can drown, so let's find out how to stay safe in the water.

Why Is It Important to Be Safe in the

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ozzi
If we take the equation and multiply out the left side, we get....

x^{2} + 2xk + k^{2} = x^{2} + x +k^{2}

The x^2 and k^2 cancel out on both sides leaving us with this...

2kx = x

If we divide both sides by 2x to isolate k, k ends up = 1/2
4 0
4 years ago
I need the answers to #1,#2 and #3
Ede4ka [16]
The answers are #1 45 #2 24 #3 10
6 0
3 years ago
About how much difference in average leaf width would you find in two forests whose average annual rainfalls are near 1500 mm bu
goblinko [34]

Answer:

4.80 mm to 2 d.p

Step-by-step explanation:

w = f(r)

f'(r) = (dw/dr) = (0.0218 mm/mm)

So, for a small difference in rainfall of 220 mm, what is the corresponding small difference in width of leaves in the two forests given.

One definition of a derivative or a rate of change is that it is the ratio of very small differences in the dependent variable to very small differences in the independent variable.

Mathematically,

(dw/dr) = (Δw/Δr) for very small Δw and Δr.

0.0218 = (Δw/220)

Δw = 0.0218 × 220 = 4.796 mm = 4.80 mm to 2 d.p

Hope this Helps!!!

5 0
3 years ago
A man travels from town x to town y at an average rate of 60 mph and returns at an average rate of 50 mph. He takes a 1/2 hour l
Georgia [21]

D/60 + D/50 = 2D/55 - 1/2

 find common denominator ( 3300)

3300/60 = 55

3300/50 = 66

3300/55=60

so then you get 55D +66D= 60(2D)-1650

121D=120D-1650

D=1650 miles

check

1650/60 =27.5, 1650/50 = 33,  27.5 + 33 = 60.5 hours total

1650/55 = 30, 30 x 2 = 60

60.5-60 = 0.5 longer

 so distance = 1650 miles

3 0
3 years ago
Find the measure of the angle indicated. <br><br> A. 130°<br> B. 142°<br> C. 145°<br> D. 38°
Inessa [10]

Answer: 142°

Step-by-step explanation:

∡BAC= 38°

∡BAN= 180°-38° = 142°

7 0
2 years ago
Read 2 more answers
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