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3 years ago

Math assignment help please.

Mathematics

1 answer:

scoundrel [369]3 years ago

3 0

Answer:

6). 7 years , 29 members ; 7). $5 is the price of the child movie ticket, $15 is the price of the adult movie ticket.

Step-by-step explanation:

6). y = 50 - 3x

y = 15 + 2x

15 + 2x = 50 - 3x

5x = 35

x = 7 years

y = 15 +2(7)

y = 29 members

In 7 years game club and sport club will have 29 members.

7). 2a + 3c = 45 ......... (1)

2a + 2c = 40 ......... (2)

(1) - (2)

c = $5 is the price of the child movie ticket

2a + 2(5) = 40

a = $15 is the price of the adult movie ticket

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Please help, I dont know how to do this

Mrrafil [7]

Answer:

$\frac{y-2}{4}$

Step-by-step explanation:

Let's start by factoring everything:

$\dfrac{\frac{y^2+y}{y^2-2y}}{\frac{4y+4}{y^2-4y+4}}=$

$\dfrac{\frac{y(y+1)}{y(y-2)}}{\frac{4(y+1)}{(y-2)^2}}=$

Now, you can cancel out some terms:

$\dfrac{\frac{y+1}{y-2}}{\frac{4(y+1)}{(y-2)^2}}=$

Now, when you divide a fraction by another fraction, that is the same as multiplying the first fraction by the reciprocal of the second one:

$\frac{y+1}{y-2}\cdot \frac{(y-2)^2)}{4(y+1)}=$

$\frac{y-2}{4}$

Hope this helps!

4 0

4 years ago

A student believes that the average grade on the statistics final examination was 87. A sample of 36 final examinations was take

Fed [463]

Answer:

The p-value for this test is 0.1375.

Step-by-step explanation:

A student believes that the average grade on the statistics final examination was 87. The student wants to test whether the average is different from 87 at 90% level of confidence.

At the null hypothesis, we test if the average is 87, that is:

$H_0: \mu = 87$

At the alternate hypothesis, we test if the average is different from 87, that is:

$H_a: \mu \neq 87$

The test statistic is:

We have the standard deviation for the sample, which means that the t-distribution is used to solve this question.

$t = \frac{X - \mu}{\frac{s}{\sqrt{n}}}$

In which X is the sample mean, $\mu$ is the value tested at the null hypothesis, $s$ is the standard deviation of the sample and n is the size of the sample.