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soldier1979 [14.2K]
3 years ago
13

Louis plans to buy a new washing machine. The washing machine costs $560 and has an estimated annual operating cost of $48. Whic

h rational function models the average annual cost in dollars of owning the washing machine for x years?

Mathematics
1 answer:
IrinaK [193]3 years ago
5 0

Answer:

The answer is D

Step-by-step explanation:

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What is the value of the product (3 – 2i)(3 + 2i)?
spayn [35]
The question follows the special product rule of polynomials.
(a-b)(a+b) = a^2 - b^2

From the given, (3-2i)(3+2i), then the answer will be 3^2 - (2i)^2
simplifying the answer:
9 - 4i^2

Take note that i = square root of -1
Then, i^2 = -1

So, 9 - (4 * -1)
= 9 - -4
= 13.

So the answer is 13.
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Graph the line y = kx +1 if it is known that the point M belongs to it: M(1,3)
tigry1 [53]

Answer:

M(x,y) = (1,3) belongs to the line y = 2\cdot x +1. Please see attachment below to know the graph of the line.

Step-by-step explanation:

From Analytical Geometry we know that a line is represented by this formula:

y=k\cdot x + b

Where:

x - Independent variable, dimensionless.

y - Dependent variable, dimensionless.

k - Slope, dimensionless.

b - y-Intercept, dimensionless.

If we know that b = 1, x = 1 and y = 3, then we clear slope and solve the resulting expression:

k = \frac{y-b}{x}

k = \frac{3-1}{1}

k = 2

Then, we conclude that point M(x,y) = (1,3) belongs to the line y = 2\cdot x +1, whose graph is presented below.

3 0
3 years ago
If 2 inches are equivalent to 5 centimeters, how many square centimeters are in one square inch
Sonja [21]

Answer:

there are 6.45 or 6.5 square cm in one square inch

Step-by-step explanation:

6 0
2 years ago
Which expression shows the factors of 9x^ +3x-2
lesya692 [45]

Answer:

\texttt{(3x+2)(3x-1)}

Step-by-step explanation:

Factors of

9x^2+3x-2

9x^2+6x-3x-2

3x(3x+2)-(3x+2)

(3x+2)(3x-1)

6 0
2 years ago
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