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Schach [20]
3 years ago
13

An air-conditioning repair technician claims to complete 67% of repairs in under an hour. A random sample of 31

Mathematics
1 answer:
igomit [66]3 years ago
4 0

Answer:

No, the difference between the sample result and what is expected is not extreme enough. The probability of it occurring by chance alone is not unlikely.

Step-by-step explanation:

Edge 2021

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Y=3×+7 y=×-9 what is the solution of the equation
Aneli [31]

Since both equations are equal to y you can just make them equal to each other, like this 3x + 7 = x - 9. From there isolate the varible x on one side so that the solution will be on the other side of the equation. I'll do the steps too for you.

3x + 7 = x - 9

2x + 7 = -9

2x = -16

x = -8

Hope this helps :)

7 0
3 years ago
Read 2 more answers
8.9 x 10^-10 in standard form
Harlamova29_29 [7]

Answer:

science E-notation: 8.900e-10

Engineering Notation: 890.0x-12

real number: 8.9E-10

-.-

Step-by-step explanation:

6 0
3 years ago
Five boxes of candles contain a total of 60 candles each box holds the same number of candles you have 84 candles how many boxes
maks197457 [2]
There are 12 candles in each box, so the there are a total of 7 boxes
7 0
3 years ago
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Ieda and Thanh both offer piano lessons. Ieda charges an initial fee of $8.50 and an hourly rate of $11.00. Thanh charges an ini
Trava [24]
The price for each instructor will be the same at 3 hours. How I determined this answer:

First off, you need to add the initial price and hourly price for each person together, so you already know how much it will cost for 1 hour, including the initial fee. Here's how you do it:

Ieda: $11.00 (hourly price) + $8.50 (initial fee) = $19.50 (for 1 hour)

Thanh: $10.50 (hourly price) + $10.00 (initial fee) = $20.50 (for 1 hour)

Now that you have the price for 1 hour including the initial fee, now you need to find the price for each hour after that. Here's how I did that:

I created a graph that looked like this:

Hours:       1                 2                  3               
Ieda:      19.50          30.50         41.50
Thanh:   20.50          31.00         41.50

Here's how I figured out the price for each hour:

Ieda:

Hour 1 (including initial price):
            $11.00 + $8.50 = $19.50
Hour 2 (excluding initial price): Only add the hourly price after Hour 1!
            $19.50 + $11.00 = $30.50 
Hour 3 (excluding initial price):
            $30.50 + $11.00 = $41.50

Thanh:

Hour 1 (including initial price):
            $10.50 + $10.00 = $20.50
Hour 2 (excluding initial price):
            $20.50 + $10.50 = $31.00
Hour 3 (excluding initial price):
            $31.00 + $10.50 = $41.50

So, looking at the graph, their prices are the same once each instruction reaches 3 hours. ($41.50)

I hope I was able to help you! :)
5 0
3 years ago
Read 2 more answers
-6(12p-8n) Please help me with this distributive property question.
ASHA 777 [7]

Answer:

=48n−72p

Step-by-step explanation: Good luck

3 0
3 years ago
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