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schepotkina [342]
3 years ago
10

A1 Carpet cleaners charges $75 to clean the first 200 sq ft of carpet. There’s an additional charge of $.25 per square foot for

any what is that exceeds 200 sq ft and $1.40 per step for any carpeting on a staircase. A customers cleaning bill was $253.95. This included the cleaning of a staircase with 13 steps. In addition to the staircase, how many square feet of carpet did the customer have cleaned?
Mathematics
1 answer:
Galina-37 [17]3 years ago
7 0
I may not be right, but according to my calculations, i got 643 square feet
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F(x) = ax + b for x in R
Solnce55 [7]

Answer:

a=3, b=-12

Step-by-step explanation:

f(x)=ax+b

f(5)=5a+b=3     [eq.1]

f(3)=3a+b=-3   [eq.2]  

[eq.2] - [eq.1]

3a+b-5a-b= -3 -3  

3a-5a=-6

-2a=-6

2a=6

a=3

substituting a=3 in eq.[1]

5a+b=3

5x(3)+b=3

15+b=3

b=3-15

ans: b=-12

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Dovator [93]

Answe The locations of E' and F' are E' (−8, 0) and F' (0, 4), and lines g and g' intersect at point F.

The locations of E' and F' are E' (−4, 0) and F' (0, 2), and lines g and g' are the same line.

The locations of E' and F' are E' (−2, 0) and F' (0, 1), and lines g and g' are parallel.

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are your answer options I went with..  The locations of E' and F' are E' (−2, 0) and F' (0, 1), and lines g and g' are parallel.

Step-by-step explanation:

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