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3 years ago

Simplified polynomial expression in standard form to represent the area of the rectangle 5x+2 x-4

Mathematics

1 answer:

hoa [83]3 years ago

5 0

Area of rectangle: 5x2 -18x - 8

//Hope this helps.

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An account earns annual simple interest. find the balance of the account.

I am Lyosha [343]

y=2000(1+.09^2)^1/2

y=2000(1.09^2)1/2

y=2000(1.1881)^1/2

y=2000(1.09)

y=$2180

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3 years ago

Complex Numbers

seropon [69]

Answer:

±10

Step-by-step explanation:

sqrt(-4) * sqrt(-25).

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sqrt(-4*-25)

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3 years ago

Nine times the sum of n and one

Sveta_85 [38]

Answer:

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3 years ago

Which of the following is an extraneous solution of (45-3x)^1/2=x-9?

Iteru [2.4K]

Answer:

C. x =3

Step-by-step explanation:

Extraneous solution is that root of a transformed equation that doesn't satisfy the equation in it's original form because it was excluded from the domain of the original equation.

Let's solve the equation first

$\sqrt{45-3x} = x-9\\Taking\ square\ on\ both\ sides\\{(\sqrt{45-3x})}^2 = {(x-9)}^2\\45-3x = x^2-18x+81\\0 = x^2-18x+81-45+3x\\x^2-15x+36 = 0\\x^2-12x-3x+36 = 0\\x(x-12)-3(x-12) = 0\\(x-3)(x-12)\\x-3 = 0\\=> x =3\\x-12 = 0\\x = 12\\We\ will\ check\ the\ solutions\ one\ by\ one\\So,\\for\ x=3\\\sqrt{45-3(3)} = 3-9\\\sqrt{45-9} = -6\\\sqrt{36}= -6\\6\neq -6\\For x=12\\\sqrt{45-3(12)} = 12-9\\\sqrt{45-36} = 6\\\sqrt{36}= 6\\6=6$

Hence, we can conclude that x=3 is an extraneous solution of the equation ..

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4 years ago

Please help I’ll make you the brainiest

lakkis [162]

Answer:

X= 5, -2

Step-by-step explanation:

This would be the answer if you are looking to "solve"

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3 years ago