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Natalija [7]
2 years ago
15

Write an inequality to represent the possible combinations of x cupcakes and y cakes sold.

Mathematics
1 answer:
kolezko [41]2 years ago
6 0

Answer:

The inequality for this would be n ≥ 20.

We know this because it must be larger than 40. We also know it can possibly be equal because the statement says "at least".

Step-by-step explanation:

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Noe take 5 minutes to rides his to down the hill to school and 10 minutes to rides up the hill from school Monday though Friday.
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What will it cost to tile a rectangular floor measuring 299 feet by by 34 feet if the tile costs $ 11 per square​ foot?
AnnZ [28]

First, you need to find the area of the room.

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6 0
3 years ago
I do not understand five through eight please help????????????
bogdanovich [222]
For number 5 the answer is 5/2
number 6 is 23/5
number 7 is 31/9
number 8 is 19

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6 0
3 years ago
Five students were tested before and after taking a class to improve their study habits. They were given articles to read which
miskamm [114]

Answer:

The obtained value of the appropriate statistic is ____.

t=\frac{\bar d -0}{\frac{s_d}{\sqrt{n}}}=\frac{3.8 -0}{\frac{2.775}{\sqrt{5}}}=3.06  

d. 3.06

p_v =2*P(t_{(4)}>3.06) =0.0376  

d. reject H0; the class appeared to improve study habits

Step-by-step explanation:

A paired t-test is used to compare two population means where you have two samples in which observations in one sample can be paired with observations in the other sample. For example if we have Before-and-after observations we can use it.  

Let put some notation  

x=before method , y = after method  

x: 10 12 14 16 12

y: 15 14 17 17 20

The system of hypothesis for this case are:  

Null hypothesis: \mu_y- \mu_x = 0  

Alternative hypothesis: \mu_y -\mu_x \neq 0  

The first step is define the difference d_i=y_i-x_i, that is given so we have:

d: 5,2,3,1,8

The second step is calculate the mean difference  

\bar d= \frac{\sum_{i=1}^n d_i}{n}=3.8  

The third step would be calculate the standard deviation for the differences, and we got:  

s_d =\sqrt{\frac{\sum_{i=1}^n (d_i -\bar d)^2}{n-1}} =2.775  

The fourth step is calculate the statistic given by :  

t=\frac{\bar d -0}{\frac{s_d}{\sqrt{n}}}=\frac{3.8 -0}{\frac{2.775}{\sqrt{5}}}=3.06  

The next step is calculate the degrees of freedom given by:  

df=n-1=5-1=4  

Now we can calculate the p value, since we have a two tailed test the p value is given by:  

p_v =2*P(t_{(4)}>3.06) =0.0376  

The p value is less than the significance level given \alpha=0.05, so then we can conclude that we reject the null hypothesis.

d. reject H0; the class appeared to improve study habits

4 0
3 years ago
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