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Xelga [282]
3 years ago
14

Zoey needed to get her computer fixed. She took it to the repair store. The technician at the store worked on the computer for 3

.25 hours and charged her $59 for parts. The total was $205.25. Write and solve an equation which can be used to determine xx, the cost of the labor per hour.
Mathematics
1 answer:
solmaris [256]3 years ago
6 0
X = Amount paid one hour
205.25 - 59 = 146.25
3.25x = 146.25
x = 146.25 ÷ 3.25

x= 45
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Find the surface are of this figure
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Answer:

If I am correct, I think the surface area is 448.

Step-by-step explanation:

First start by finding the area of all the sides

Front side. 12 x 10 = 120

2 triangle sides: 8 x 10 = 80, 80 x 2 = 160

Bottom side: 6 x 12 = 72

Back side: 8 x 12 = 96

Then add up the surface area

120 + 160 + 72 + 96 = 448

Btw I don't know if I am correct, but I think this is the way you find surface area.

4 0
2 years ago
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A supervisor records the repair cost for 14 randomly selected refrigerators. A sample mean of $79.20 and standard deviation of $
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Answer:

( $74.623, $83.777)

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Step-by-step explanation:

Confidence interval can be defined as a range of values so defined that there is a specified probability that the value of a parameter lies within it.

The confidence interval of a statistical data can be written as.

x+/-zr/√n

Given that;

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Using the z table;

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Critical value at 90% confidence z = 1.645

Substituting the values we have;

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( $74.623, $83.777)

The 90% confidence interval is = ( $74.623, $83.777)

5 0
3 years ago
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REY [17]

Answer:

Option C is correct. Option f is the same as option C

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In order to test for high school students in the district for Attention Deficit disorder(ADD), they could have chosen any 250 students from any school with grades betweem nine to twelve throughout the district.

4 0
4 years ago
A 2-pound box of spaghetti costs $2.50. Philip says that the unit cost is 2 over 250 = $0.80 per pound. Explain his error
7nadin3 [17]
Phillip forgot to put a period between 2 and 50
4 0
3 years ago
Please help with all. I’m not sure if I’m wrong, PLEASE HELP I WILL GIFT ALL MY POINTS AND BRAINIEST ANSWER
Salsk061 [2.6K]

Answer:

Yes, you are right. Great job!

Step-by-step explanation:

4 0
3 years ago
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