4 years ago

Answer 3-4 pleaseeeeee

Mathematics

1 answer:

aivan3 [116]4 years ago

4 0

I think #4 is 4 but I'm not completely sure

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Suppose I want to build a garden abutting my house, using the house as the west side of the garden. The south and east sides of

Kruka [31]

<h2>Minimum cost is 1800 $</h2>

Step-by-step explanation:

Let l be the length of west side and w be the length of north side.

East side = West side = l

North side = South side = w

Area = lw = 540 ft²

We have

$lw=540\\\\w=\frac{540}{l}$

Cost for fencing

C = 30 w + 30 l + 20 w = 30 l + 50 w

$C=30l+50\times \frac{540}{l}\\\\C=30l+\frac{27000}{l}$

At minimum cost derivative is zero,

That is

$dC=30dl-\frac{27000}{l^2}dl\\\\30-\frac{27000}{l^2}=0\\\\30=\frac{27000}{l^2}\\\\l^2=900\\\\l=30ft$

We have

lw = 540

30 x w =540

w = 18 ft

Cost = 30 l + 50 w =30 x 30 + 50 x 18 = 1800 $

Minimum cost is 1800 $

8 0

3 years ago

Using the table above determine the missing value using the equation y equals 4x + 9

vesna_86 [32]

the answer is B 37 your welcome

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3 years ago

Compute the total and annual returns on the following investment. Twenty years after purchasing shares in a mutual fund for $63

lesya [120]

Answer:

76.2% total return
2.87% annual return

Step-by-step explanation:

The total return is the rate of increase over the whole period:

% change = (11100/6300 -1) × 100% = 76.2%

The annual return is the rate of return that gives this growth over 20 years:

(1 +r)^20 = 1 +76.2%

r = 1.762^(1/20) -1 ≈ 2.87%

The total return is about 76.2%; the annual return is about 2.87%.

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3 years ago

Are the terms 3y and - y like terms?<br><br> Yes/No

Dennis_Churaev [7]

Answer:

Step-by-step explanation:

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3 years ago

Which is true regarding the sequence below?

strojnjashka [21]

What? Add more detail please

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3 years ago