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jeyben [28]
3 years ago
8

Which of these phrases contain a variable? Check all that apply. A three cups of salsa B the weight of the puppy C the cost the

of dinner D twenty feet of wire
Mathematics
1 answer:
Lyrx [107]3 years ago
4 0

Answer:

phrases B and C are variables.

Step-by-step explanation:

Any thing whose value can be changed is called variable.

Whereas, if the value is fixed then it is called a constant.

We can use these definitions to find the phrases that contains a variable.

First option is: A three cups of salsa - It is constant because, the number of cups of salsa is fixed which is 3.

Second option is: the weight of the puppy - It is variable because, the weight of the puppy can be changed and not always fixed.

Third option is : the cost the of dinner- It is variable because, the cost of the dinner can be changed and depends on the quantity of the food ordered.

Last option: twenty feet of wire: It is a constant because the length of the wire is fixed which is 20 feet.

Therefore, the phrases B and C are variables.

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For a sample of n = 30 scores, a score that is 6 points above the mean has a z-score of z = 1.50. What is the sample standard de
sleet_krkn [62]

Answer:

4

Step-by-step explanation:

The z-score is calculated by the following formula

z=(x-μ)/σ

where

μ=Population mean

σ=Population standard deviation

If the z-score for a specific sample mean is discussed then z-score is computed as

z=xbar-μ/σxbar.

where

μ=Population mean

σxbar=Sample standard deviation

As the population mean and mean of sampling distribution of mean are equal so, μ is used in above equation.

Now, the z-score is given

1.5=xbar-μ/σxbar

σxbar=xbar-μ/1.5.

Also we know that z-score corresponds to a score that is 6 points above mean which means that xbar-μ=6.

σxbar=6/1.5

σxbar=4.

Thus, the required sample standard deviation is 4.

6 0
3 years ago
Can anyone help me please
Xelga [282]

popopoppopopoopopopp[poopopopopopop

3 0
2 years ago
PLEASE HELP— URGENT// MIDDLE SCHOOL MATHEMATICS
MaRussiya [10]

Answer:

Step-by-step explanation:

The new bike costs 180 dollars

Parents paid 40%

what is a percentage? per cent= divide by 100

parents paid 180 *40/100=180*0.4=72 dollars

Jennifer has to pay the rest

180-72=108

4 0
2 years ago
Read 2 more answers
2. Find the surface area of the solid
PolarNik [594]

Answer:

C. SA = 148.8 ft

Step-by-step explanation:

3.1×8×6= 148.8

4 0
3 years ago
11. In a sample of n=6, five individuals all have scores of X=10 and the sixth person has a score of x=16. What is the mean for
ahrayia [7]

Answer:

11

Step-by-step explanation:

Given that in a sample of n=6, five individuals all have scores of X=10 and the sixth person has a score of x=16

i.e. the data entries are

10,10,10,10,10,16

Sum = 66

No of items n = 6

Average = sum/no of entries

=\frac{66}{6} \\=11

Average is 11.

mean of this sample is 11

8 0
3 years ago
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