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lana66690 [7]
3 years ago
7

How many three-letter "words" can be made from 9 letters "fghijklmn" if repetition of letters (a) is allowed?

Mathematics
1 answer:
11Alexandr11 [23.1K]3 years ago
8 0
729. You just do 9 to the power of 3 or 9^3 and you will get 729. If it is not allowed, the answer is 504.(9 x 8 x 7)
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ikadub [295]

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122.6875 (122 ft 8.25 in)

Step-by-step explanation:

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Evaluate the expression when x=-5 <br> X^2 + 6x-9
d1i1m1o1n [39]

The value of the function f(x) = x² + 6x - 9 when x = -5 is  -14.

<h3>What is an equation?</h3>

An equation is an expression that shows the relationship between two or more numbers and variables.

An independent variable is a variable that does not depends on other variable while a dependent variable is a variable that depends on other variable.

Given that:

f(x) = x² + 6x - 9

When x = -5:

f(-5) = (-5)² + 6(-5) - 9 = -14

The value of the function f(x) = x² + 6x - 9 when x = -5 is  -14.

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