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ASHA 777 [7]
3 years ago
11

What is the answer too -4(3a-5b-7)

Mathematics
1 answer:
Brut [27]3 years ago
6 0

Hope it will help u.........

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The customer service center in a large new york department store has determined that the amount of time spent with a customer ab
Elina [12.6K]
Since you didn't give an amount of time, we can't give an exact value. However, I can help you with the steps so you can get the correct answer.

First, you need to find the correct z-score. Then, use a standard normal distribution table to find the percent.

Let the time that you are looking for equal X. 

The formula for your z-score is:

(x - 8.7) / 2.1 = z-score
4 0
3 years ago
Paul is driving his car. At the end of two hours he has driven 68 miles, then at the end of 4 hours he has driven 132 miles. Wha
lakkis [162]

This problem describes two points in a route of 4 hours. He went through 68 miles after the first two hours, and 132 miles after 4 hours of driving. We need to calculate the average rate of change.

The average rate of change is the division between the total distance and the time it took to travel that distance, so we have:

r=\frac{132}{4}=33\text{ miles per hour}

The average rate of change is equal to 33 miles per hour.

7 0
2 years ago
WHAT THE SIMPLEST form of 36/16
AlekseyPX
The simplest form is 2 1/4
4 0
4 years ago
A car travels a constant speed of 45 km/h
Paha777 [63]

Answer:

1 hour

Step-by-step explanation:

because i divided

3 0
3 years ago
A hot air balloon festival, Mohammed’s balloon is at 40 feet and rises at a rate of 10 ft./min. dana’s balloon is at a height of
nekit [7.7K]

Answer:

  • 5 minutes
  • 90 ft

Step-by-step explanation:

After some number of minutes m, Mohammed's altitude will be ...

  40 +10m

and Dana's altitude will be ...

  165 -15m

The altitudes will be the same when ...

  40 +10m = 165 -15m

  25m = 125 . . . . . . . . . . . add 15m-40

  m = 5 . . . . . . . . . . . . . . . divide by 25

The height of the two balloons after 5 minutes will be 40+10·5 = 90 ft.

8 0
3 years ago
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