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konstantin123 [22]
3 years ago
6

Please help me in Math

Mathematics
1 answer:
Rashid [163]3 years ago
8 0
1. You can add 7 units to both sides of the scale so it becomes a balance between x on the left and 21 on the right.
  x ___ 21

1A) The only number from the set that will keep the balance is x ∈ {21}
1B) The number on the right (21) will be more than x for x ∈ {0, 1, 7, 14}
1C) The number on the right (21) will be less than x for x ∈ {28, 30}


2A) (x +x +x) +(2 +4) = 102
  3x +6 = 102 . . . . . . . . simplified equation

2B) Solving the equation, you have
  3x = 102 -6
  x = 96/3 = 32
The number that could be a value of x is 32.
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A hiker climbs a 5-mile trail up a mountain in 2 hours. On the return trip downhill, she walks the same trail and returns to her
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3.33 miles per hour

Step-by-step explanation:

The total distance traveled by the hiker is 5 * 2 = 10 miles, and the total time travelled is 2 + 1 = 3 hours.

So, to find the average speed of the entire trip, we can use the formula:

distance = speed * time

With distance = 10 and time = 3, we have:

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3 years ago
Tyler was shoving an equation and his last line of work read -12=12. What does this mean
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Answer:

Step-by-step explanation:

-12 = 12 ....this is incorrect...meaning no solutions

**

if it ended in :

x = a number, or y = a number...means there is 1 solution

if it ended in :

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6 0
3 years ago
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1. Ima Thief robs a bank and takes off in a getaway car. Five minutes Polly Srule takes off after Ima.
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A

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Thirty three different video games showing violence were observed. The duration times of violence ​(in seconds) were recorded. W
AlladinOne [14]

Answer:

The "df" stands for "degrees of freedom", and represents the number of independent observations in a set of data.

Its value in this case is df=32.

Step-by-step explanation:

The sample is of size n=33.

As we do not know the population's standard deviation, we use as estimate the sample's standard deviation. Because of this, we use the t-statistic in place of the z-value.

The "df" stands for "degrees of freedom", and represents the number of independent observations in a set of data (the data in this case is the sample of 33 video games).

In one-sample tests, the degrees of freedom are calculated as:

df=N-1=33-1=32  

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