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3 years ago

Which expression is NOT equal to 729? 3 × 3 × 3 × 3 × 3 × 3 6,3 9 × 9 × 9 36

Mathematics

1 answer:

suter [353]3 years ago

8 0

Answer:

Rewrite as an equation.

log

9(729)=x

Rewrite

log

9(729)=x

in exponential form using the definition of a logarithm. If

x and b

are positive real numbers and b

does not equal 1, then log b(x)=y is equivalent to by=x. 9x=729

Create expressions in the equation that all have equal bases.

(32)x=3

Rewrite

(32)x as 32x. 32x=36

Since the bases are the same, then two expressions are only equal if the exponents are also equal.

2 x 3=6

Solve for

x.x=3

The variable x

is equal to

3.3

Step-by-step explanation:

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leonid [27]

Answer:

x^2 + 2x^2 + 1 = x^4 + 2x^2 +1

Step-by-step explanation:

pythagorean theorem

a^2 + b^2 = c^2 where a and b are the legs

substitute what we know

(x^2 -1)^2 + (2x)^2 = (x^2+1)^2

FOIL

(x^2 -1)^2 = (x^2-1 ) (x^2-1) = x^4 -x^2 - x^2 +1 = x^4 -2x^2 +1

(2x)^2 = 4x^2

(x^2+1)^2 = (x^2+1 ) (x^2+1) = x^4 +x^2 +x^2 +1= x^4 + 2x^2 +1

substitute these back in

x^4 -2x^2 +1 +4x^2 = x^4 + 2x^2 +1

combine like terms

x^2 + 2x^2 + 1 = x^4 + 2x^2 +1

Since the left and right side are equal, this is a right triangle

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3 years ago

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Factor completely. 36x4+18x3+40x2 Enter your answer in the box.

sattari [20]

Answer:

2x^2·(18x^2 +9x +20)

Step-by-step explanation:

The terms all have a common factor of 2x^2. Removing that leaves a quadratic that cannot be factored using integers.

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4 years ago

Convert 23 m into mm

sergiy2304 [10]

Answer: It is 23,000 Millimeters

Step-by-step explanation:

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tekilochka [14]

Answer:

#1) 15*6*7=630CM^3

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Step-by-step explanation:

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3 years ago

when you reverse the digits in a certain two-digit number you increase its value by 45. Find the number if the sum of its digits

mart [117]

The answer is 58.

First, we need to find "x", being the number.

13+45=58
X=58

----------------------------------------------------------------------------------------------------------

<h3>How did we get 58 though?</h3><h3></h3><h3>----------Steps---------</h3>

Add 3+5
3+5=8
Then add 1+4
1+4=5

Therefore, the answer is 58.

X=58

<h3>Hope this heIps!</h3>

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