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3 years ago

Please help me I don’t get this at all thank you

Mathematics

2 answers:

romanna [79]3 years ago

8 0

There are two missing side lengths that are needed in order to calculate the perimeter.

The value of one of the missing side lengths is:

$31-18=13$

The value of the second one is:

$22-9=13$

Now that we have all the side lengths, we add them together to find the perimeter.

$22+31+9+18+13+13=106$

The perimeter of the basement floor is 106 ft. Let me know if you need any clarifications, thanks!

~ Padoru

faust18 [17]3 years ago

6 0

Answer:

80 ft

Step-by-step explanation:

Perimeter is adding the lengths of all the sides.

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3 years ago

(4) use the method of lagrange multipliers to determine the maximum value of f(x, y) = x a y b (the a and b are two fixed positi

wlad13 [49]

Assuming $f(x,y)=x^ay^b$ . We have Lagrangian

$L(x,y,\lambda)=x^ay^b+\lambda(x+y-1)$

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Solving this system of linear equations yields $x=\dfrac a{a+b}$ and $y=\dfrac b{a+b}$ as the sole critical point, which in turn gives a maximum value of $f\left(\dfrac a{a+b},\dfrac b{a+b}\right)=\dfrac{a^ab^b}{(a+b)^{a+b}}$ .

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3 years ago

What is the product of 2x - 5 and 3x² + 5x - 7? Write your answer in standard form.

Akimi4 [234]

Answer:

see below

Step-by-step explanation:

(a)

$( 2x - 5 )(3x^{2} + 5x - 7)\\\\=2x(3x^2+5x-7)-5(3x^2+5x-7)\\\\=6x^3+10x^2-14x-15x^2-25x+35\\\\=6x^3+(10x^2-15x^2)+(-14x-25x)+35\\\\=6x^3-5x^2-39x+35$

(b)

$(2x-5)(3x^2+5x-7)=(5x-2)(3x^2+5x-7)\\\\\frac{1}{(3x^2+5x-7)}(2x-5)(3x^2+5x-7)= \frac{1}{(3x^2+5x-7)}(5x-2)(3x^2+5x-7)\\\\2x-5=5x-2\\\\2x-5x=-2+5\\\\-3x=3\\\\x=-1$

only happens when x=-1, not always

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4 years ago