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Vedmedyk [2.9K]
2 years ago
8

Increase £40 by 15%

Mathematics
1 answer:
matrenka [14]2 years ago
8 0

Answer:

£46

Step-by-step explanation:

40 increased by 15 percent is because 15 percent of 40 is 6

adding this increase to it makes it 46 pounds

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Which of the following is a rational number? (4 points)
abruzzese [7]

Step-by-step explanation:

square root 15 = irrational

square root 16 = 4 = rational

square root 21 = irrational

square root 22 = irrational

8 0
3 years ago
Read 2 more answers
A professor would like to test the hypothesis that the average number of minutes that a student needs to complete a statistics e
professor190 [17]

Answer:

\chi^2 =\frac{15-1}{25} 16 =8.96

The degrees of freedom are given by:

df = n-1 = 15-1=14

The p value for this case would be given by:

p_v =P(\chi^2

Since the p value is higher than the significance level we have enough evidence to FAIL to reject the null hypothesis and we can conclude that the true deviation is not ignificantly lower than 5 minutes

Step-by-step explanation:

Information given

n=15 represent the sample size

\alpha=0.05 represent the confidence level  

s^2 =16 represent the sample variance

\sigma^2_0 =25 represent the value that we want to  verify

System of hypothesis

We want to test if the true deviation for this case is lesss than 5minutes, so the system of hypothesis would be:

Null Hypothesis: \sigma^2 \geq 25

Alternative hypothesis: \sigma^2

The statistic is given by:

\chi^2 =\frac{n-1}{\sigma^2_0} s^2

And replacing we got:

\chi^2 =\frac{15-1}{25} 16 =8.96

The degrees of freedom are given by:

df = n-1 = 15-1=14

The p value for this case would be given by:

p_v =P(\chi^2

Since the p value is higher than the significance level we have enough evidence to FAIL to reject the null hypothesis and we can conclude that the true deviation is not ignificantly lower than 5 minutes

6 0
3 years ago
Answer the question.thank you
dlinn [17]

Answer:

Perimeter of Triangle: 6x+15

x=12.5

Step-by-step explanation:

The perimeter is the sum of all of the sides of the triangle.

Hence, the perimeter =3x+3x+15=6x+15

Since the perimeter is 90, 6x+15=90.

Subtract 15 from both sides:

6x+15-15=90-15

6x=75

Divide both sides by 6:

\frac{6x}{6}=\frac{75}{6}

x=12.5

4 0
2 years ago
HURRY I GIVE BRAINLIEST AND EXTRA POINTS !!!!
Temka [501]
11/3 is equal to 3 2/3
8 0
3 years ago
1 of 5<br>What is the nth term rule of the linear sequence below?<br>2,5, 8, 11, 14, ...<br>w<br>Tn​
Alika [10]

Answer: 3n-1

The difference between each of the numbers is 3.  This means that we have 3n.

If we assume that for the first number n=1, then 3*1=3, but the value we have is 2. This means that we must subtract 1 to get from 3 to 2.

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3 years ago
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