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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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Find the cost of tiling a rectangular plot of land 300m long and 150m wide at the rate of $6 per hundred square m​
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PLEASE HELP!! Compare & Contrast how Completing the Square is used to Convert a quadratic function to vertex form with how i
Likurg_2 [28]

Answer:

Step-by-step explanation:

Given a general quadratic formula given as ax²bx+c = 0

To generate the general formula to solve the quadratic equation, we can use the completing the square method as shown;

Step 1:

Bringing c to the other side

ax²+bx = -c

Dividing through by coefficient of x² which is 'a' will give:

x²+(b/a)x = -c/a

- Completing the square at the left hand side of the equation by adding the square of half the coefficient x i.e (b/2a)² and adding it to both sides of the equation we have:

x²+(b/a)x+(b/2a)² = -c/a+(b/2a)²

(x+b/2a)² = -c/a+(b/2a)²

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- Taking the square root of both sides

√(x+b/2a)² = ±√-c/a + b²/√4a²

x+b/2a = ±√(-4ac+b²)/√4a²

x+b/2a =±√b²-4ac/2a

- Taking b/2a to the other side

x = -b/2a±√√b²-4ac/2a

Taking the LCM:

x = {-b±√b²-4ac}/2a

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3 years ago
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Bolded numbers are answers.

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3 years ago
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Just multiply the with and the length by four (considering the scale factor is 4)
3x4=12 and 7x4=28
6 0
4 years ago
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