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sladkih [1.3K]
2 years ago
13

shirley is going to have the exterior of her home painted. tims painting charges  $250 plus $14 per hour. colorful prints charge

s  $22 per hoour. how many hours would the job need to take for tims painting to be a better deal
Mathematics
1 answer:
Alexandra [31]2 years ago
6 0
x-\ number\ of\ hours\\\\
250+14x
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Geometry question 3, Thanks if you answer or help!
shepuryov [24]

Answer:

67°

Step-by-step explanation:

Angles on a straight line add to 180, so:

A + D = 180

D = 180 - A

D = 180 - 113

D = 67

4 0
3 years ago
The frequency table shows how many visits to the library students in a school have made in the last month.
vfiekz [6]
<h3>Answer:  2.8</h3>

=======================================================

Explanation:

Multiply each visit count with their corresponding frequency.

Examples:

  • 0*12 = 0 for the first row.
  • 1*366 = 366 for the second row
  • 2*53 = 106 for the third row

and so on...

I recommend making a third column like this

\begin{array}{|c|c|c|} \cline{1-3}\text{Visits} & \text{Frequency} & \text{Visits*Frequency}\\\cline{1-3}0 & 12 & 0\\\cline{1-3}1 & 366 & 366\\\cline{1-3}2 & 53 & 106\\\cline{1-3}3 & 52 & 156\\\cline{1-3}4 & 155 & 620\\\cline{1-3}5 & 243 & 1215\\\cline{1-3}\end{array}

That way you can keep track of all the results in an organized way.

Then add everything in the third column

0+366+106+156+620+1215 = 2463

Divide this sum over the total frequency (12+366+53+52+155+243 = 881) and we'll get the mean

2463/881 = 2.7956867

Rounding to one decimal place gets us to 2.8 as the final answer.

-------------

The much longer way to do this is to imagine 12 copies of "0", 366 copies of "1", 53 copies of "2", and so on. We'll have an extremely large data set of 881 items inside it. As you can see, this second method is definitely not recommended to actually carry out. Rather it's helpful to have this as a thought experiment to see why we revert to multiplication instead.

Eg: Imagine adding 155 copies of "4". A shortcut is to simply say 4*155 = 620

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1 year ago
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Just here to get points sorry
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2 years ago
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If 2x − 3 = 7, evaluate 3x + 4.
timofeeve [1]
X equals 5 so 3x+4= 19 ..................
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3 years ago
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Arrange the following in numerical order lowest first:
Hunter-Best [27]

Answer:

-2.7, - 0.13, - 0.05, 1.9, 1.91, 21.025, 21.2

7 0
3 years ago
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