3 years ago

A plumber charges $55 for a service call plus $35 per hour. If The plumbers bill was $160, how many hours was he there?

1 answer:

7 0

He was there for 3 hours.

Explanation:
160-55=105
105 divided by 35 to find the number of hours.

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hjlf

180-50= 130 so x=130 or 360-100=260 then 260/2=130 so x=130

7 0

3 years ago

Romashka-Z-Leto [24]

Answer:

$\= x = 82$

$s = 9.64$

Step-by-step explanation:

From the question we are told that

The data is 87 91 86 82 72 91 60 77 80 79 83 96

Generally the point estimate for the mean is mathematically represented as

$\= x = \frac{\sum x_i }{n}$

=> $\= x = \frac{87 +91 + 86 + \cdots + 96}{12}$

=> $\= x = 82$

Generally the point estimate for the standard deviation is mathematically represented as

$s = \sqrt{\frac{ \sum ( x_i - \= x )^2 }{ n -1 } }$

=> $s = \sqrt{\frac{ ( 87 - 82 )^2 +( 91 - 82 )^2 + \cdots + ( 96 - 82 )^2 }{ 12 -1 } }$

=> $s = 9.64$

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4 years ago

Vanyuwa [196]

I'm assuming this is just a simple addition problem so 12,383 miles plus 113,211 miles is equal to 125 594 miles

8 0

4 years ago

Setler [38]

Answer: do the a dozen for $13.50

Step-by-step explanation: It will help save money

5 0

3 years ago

insens350 [35]

Its 25 because she learned the 10 recipes in 2 weeks so 4 weeks is 20 and 5 weeks is 25 if its wrong some how than I'm tired so don't blame me

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3 years ago