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ziro4ka [17]
4 years ago
5

Four plumbers each charge a flat fee plus an hourly rate for repair visits. The table shows their total costs for repairs that r

equired various amounts of time. Total Cost of Repairs Hours needed for repair Cost for plumber A Cost for plumber B Cost for plumber C Cost for plumber D 1 $35 $55 $50 $50 2 $65 $75 $75 $60 3 $95 $95 $100 $70 Which plumber charges the greatest hourly rate? plumber A plumber B plumber C plumber D
Mathematics
2 answers:
stiv31 [10]4 years ago
8 0

Answer:

A

Step-by-step explanation:

The hourly rate that the plumbers charge is 30

kogti [31]4 years ago
6 0

Answer:

Plumber A

Step-by-step explanation:

Given the following :

Hours ___repair cost

________A ____B____C_____D

1 ______$35___55___50____50

2 _____ $65__ $75__ $75__ $60

3 _____ $95__ $95 _$100 ___$70

Charge plan:

Flat fee(x) + hourly rate(y)

For 1 hour:

Plumber A:

x + y = 35 ; x = 35 - y

x + 2y = 65 ;

35 - y + 2y = 65

y = 65 - 35 = $30 hourly

Plumber B:

x + y = 55 ; x = 55 - y

x + 2y = 75 ;

55 - y + 2y = 65

y = 65 - 55 = $10 hourly

Plumber C:

x + y = 50 ; x = 50 - y

x + 2y = 75 ;

50 - y + 2y = 65

y = 65 - 50 = $15 hourly

Plumber D:

x + y = 50 ; x = 50 - y

x + 2y = 60 ;

50 - y + 2y = 60

y = 65 - 50 = 10 hourly

Hence, Plumber A charges the highest hourly rate at $30 per hour

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How many digits you need to write all 3 digit numbers
7nadin3 [17]

Answer: 720

Step-by-step explanation: if what you want are all possible three digit numbers with no repetition of the digits then you have 10 choices for the first digit, you have 9 choices for the 2nd digit, and you have 8 choices for the 3rd digit giving you 10x9x8 = 720 in all.

8 0
3 years ago
Solve the inequality. graph the solution
Levart [38]

Answer:

a or the first one

Step-by-step explanation:

x - 1 ≤ 6

add 1 to both sides

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Notacion cientifica de 760000000
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7.6^8

Step-by-step explanation:

7 0
3 years ago
sally has a pet snail that fell into a well.The well is 16 feet deep. Each day the snail climbs up 5 feet, but each night slides
sp2606 [1]

Answer:

16 days

Step-by-step explanation:

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7 0
3 years ago
Read 2 more answers
Pls help these are my teachers instructions
Yanka [14]

The mistake he did, was in calculating powers, when 12 is taken to numerator it becomes -12 and 6-12 is -6 and not 6 so power of x should be -6 i.e x^-6 and not x^6

So, the correct answer is =\frac{27}{4x^{6}y^{8}}

Step-by-step explanation:

We need to simplify:

\frac{4(3x^2y^4)^3}{(2x^3y^5)^4}

Solving:

\frac{4(3x^2y^4)^3}{(2x^3y^5)^4}

Multiplying power with the terms inside the bracket.

=\frac{4(3^3x^6y^{12})}{2^4x^{12}y^{20}}\\=\frac{4(27x^6y^{12})}{16x^{12}y^{20}}\\=\frac{108x^6y^{12}}{16x^{12}y^{20}}

Now combining powers of same variable i.e if \frac{x^a}{x^b}=x^{a-b}

Solving:

=\frac{108x^{6-12}y^{12-20}}{16}\\=\frac{108x^{-6}y^{-8}}{16}\\Divide\,\,by\,\,4:\\=\frac{27x^{-6}y^{-8}}{4}

The exponent rule says: if x^{-1} \,\,then\,\, \frac{1}{x}

=\frac{27}{4x^{6}y^{8}}

The mistake he did, was in calculating powers, when 12 is taken to numerator it becomes -12 and 6-12 is -6 and not 6 so power of x should be -6 i.e x^-6 and not x^6

So, the correct answer is =\frac{27}{4x^{6}y^{8}}

Keywords: Exponents

Learn more about Exponents at:

  • brainly.com/question/13174254
  • brainly.com/question/13174255
  • brainly.com/question/13174259

#learnwithBrainly

3 0
3 years ago
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