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zysi [14]
3 years ago
13

According to the rate of local telephone call, the minimum charge up to the first 175 calls is Rs. 200. Calculate the total char

ge for 145 call including 15% service charge and 10% VAT
Mathematics
1 answer:
ludmilkaskok [199]3 years ago
6 0

Answer:

the total charge of 145 call with all charge and vat is 181.25

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You want to estimate the proportion of kids between the ages of 12 and 15 who have tried marijuana. You take a random sample of
kirill115 [55]
<h2>Answer with explanation:</h2>

Let p represents the population proportion.

By considering the given information, we have

H_0: p=0.29\\\\H_a: p\neq0.29

∵ the alternative hypothesis is two tailed , so the test is two-tailed test.

Given : For sample size :n= 130,  \hat{p}=0.23

Test statistic: z=\dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}}

z=\dfrac{0.23-0.29}{\sqrt{\dfrac{0.29(1-0.29)}{130}}}\\\\=-1.50762993902\approx-1.51

P-value (two -tailed test)=2P(z>|-1.51|)=0.1310434\approx 0.131

Since , the p-value (0.131) is greater than the significance level (0.03), so we accept the null hypothesis.

Thus , we conclude that we have sufficient evidence to support the null hypothesis  that the true population proportion of Maryland students who have smoked marijuana is 29% .

5 0
3 years ago
(−4 + 5) − (6 + 7) = x x 0
weeeeeb [17]

1

Add the numbers

(

−

4

+

5

)

−

(

6

+

7

)

=

0

({\color{#c92786}{-4}}+{\color{#c92786}{5}})-(6+7)=xx^{0}

(−4+5)−(6+7)=xx0

(

1

)

−

(

6

+

7

)

=

0

({\color{#c92786}{1}})-(6+7)=xx^{0}

(1)−(6+7)=xx0

2

Add the numbers

1

−

(

6

+

7

)

=

0

1-({\color{#c92786}{6}}+{\color{#c92786}{7}})=xx^{0}

1−(6+7)=xx0

1

−

(

1

3

)

=

0

1-({\color{#c92786}{13}})=xx^{0}

1−(13)=xx0

3

Multiply the numbers

1

−

1

⋅

1

3

=

0

1{\color{#c92786}{-1}} \cdot {\color{#c92786}{13}}=xx^{0}

1−1⋅13=xx0

1

−

1

3

=

0

1{\color{#c92786}{-13}}=xx^{0}

1−13=xx0

4

Subtract the numbers

1

−

1

3

=

0

{\color{#c92786}{1-13}}=xx^{0}

1−13=xx0

−

1

2

=

0

{\color{#c92786}{-12}}=xx^{0}

−12=xx0

5

Combine exponents

−

1

2

=

0

-12={\color{#c92786}{xx^{0}}}

−12=xx0

−

1

2

=

1

-12={\color{#c92786}{x^{1}}}

−12=x1

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Solution

−

1

2

=

1

3 0
3 years ago
Kai traveled home and made several stops and detours along the way, as shown by the graph.
storchak [24]

Answer:

The graph increases if the line goes upwards. (The end of the segment is above the start of the segment)

The graph decreases if the line goes downwards. (The end of the segment is below the start of the segment)

The graph is constant if the line is horizontal. (The end of the segment is at the same height as the start of the segment)

Then:

The graph of the function is increasing in the segments c and e.

The graph of the function is decreasing in the segments a and f.

The graph of the function is constant in the segments b and d.

7 0
3 years ago
Choose the best graph that represents the linear equation -5x - y= 0
asambeis [7]
Well we can’t see all the graphs
7 0
3 years ago
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Solve the linear equation. 3x = 24 x = ?
trapecia [35]

Answer:

3x =24

x = 24 -3

x = 21 (ans)

6 0
3 years ago
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