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storchak [24]
3 years ago
6

Pls anser correctly

Mathematics
2 answers:
Radda [10]3 years ago
7 0

Answer:

hello!!

the answer would be 6 cupcakes.

I have this question on my session rn

have a great day

-Chilly

Fofino [41]3 years ago
3 0

If 25% of the cupcakes were chocolate, she would have bought <u>6 chocolate cupcakes</u>

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Let the following sample of 8 observations be drawn from a normal population with unknown mean and standard deviation: 22, 18, 1
BigorU [14]

Answer:

a:  Sample mean: 20, Sample standard deviation: 1.732

b:  19.13 <µ < 20.87

c:  18.84< µ < 21.16

d:  as the confidence level increases, the interval becomes wider

Step-by-step explanation:

a:  Sample mean is found by adding up all the individual values of the sample, then dividing by the total number of values in the sample.  

Sample standard deviation is the square root of the variance

See the first attached photo for the calculations of these values.

We need to create a 80% confidence interval for the population.  Since n < 30, we will use a t-value with degree of freedom of 7 (the degree of freedom is always one less than the sample size.  

Look for the column on the t-distribution chart that has "area in two tails" of 0.20 (80%), and row 7 (degree of freedom)

The t-value is 1.415

See the second attached photo for the construction of the confidence interval

We need to create a 90% confidence interval for the population.  Since n < 30, we will use a t-value with degree of freedom of 7 (the degree of freedom is always one less than the sample size.  

Look for the column on the t-distribution chart that has "area in two tails" of 0.10 (90%), and row 7 (degree of freedom)

The t-value is 1.895

See the third attached photo for the construction of the confidence interval

3 0
3 years ago
3 solutions to y=-5x+1
Luda [366]
Y = -5x + 1

x = 1 , y = -4
x = 2 , y = -9
x = 3 , y = -14

so the answers are
(1,-4) 
(2,-9)
(3,-14)
7 0
3 years ago
Answer:the largest angle has a measure of _____degrees.
ratelena [41]

Answer:

depends mostly it'll b 180 degress

Step-by-step explanation:

4 0
2 years ago
Which of the following expressions is equivalent to -5.4 - (2.1 + 1.8)?
Paul [167]

Answer:

its the first one

Step-by-step explanation:

7 0
3 years ago
When 10 b = 5 (StartRoot c EndRoot + 2) is solved for c, one equation is c = (2b minus 2) squared Which of the following is an e
Burka [1]

Answer:

I will show all the steps to lead to the solution.

1) 10b = 5 (√c + 2)  <---- starting equation

2) divide by 5 => 2 b = √c + 2

3) subtract 2 => 2b - 2 = √c

4) raise to the power 2 => (2b - 2)^2 = c, which is the expression given.

Now these are two equivalent forms:

1) extract 2 from the parentheses: c = 4 (b -1)^2

2) expand the parentheses: c = 4b^2 - 8b + 4)

Step-by-step explanation:

Choice D

8 0
3 years ago
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