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3 years ago

Help please. PLEASE!!! ✌

Mathematics

2 answers:

kaheart [24]3 years ago

5 0

1) 7x-12
2) subtract 9 from 14 first and then multiply 6 to the answer
3) x=21
4) n<_ -9
5) 3+4+1=3+4+1

babunello [35]3 years ago

3 0

1) 7x-12
2) p=30
3) x=21
4) I'm confused as well sorry
5) (5+4)+2 = 5+(4+2)

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Can someone help me.me and my friends are at a loss

Ganezh [65]

From the number given is appears the rule is y = 2x + 1
This works for all three:
17 = 2(8) + 1
1 = 2(0) + 1
15 = 2(7)+1

6 0

3 years ago

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Pls answer fast my teacher is waiting!

a_sh-v [17]

Answer:

For company A, y = 24x + 42

For company B, y = 28x + 25

Step-by-step explanation:

x is the number of containers

y is the total cost

For company A, y = 24x + 42

For company B, y = 28x + 25

For the cost of both companies to be the same, then

24x + 42 = 28x + 25

28x - 24x = 42 - 25

4x = 17

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4 0

3 years ago

2/3 x 4/7 write the answer in the simplest form

trapecia [35]

Answer:

8/21

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6 0

3 years ago

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A box of uncooked spagetti costs $0.1369 per ounce. how much is this rounded to the nearest cent?

m_a_m_a [10]

Money is written with two places after the decimal. To round to the nearest scent, round to the hundredths place. In 0.1369 the 3 is in the hundredths place. Use the number directly after it, 6, to round. Because six is five or greater, it rounds the 3 up to 4. The answer is $0.14

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3 years ago

In a clinical study of an allergy drug, 108 of the 200 subjects reported experiencing significant relief from their symptoms. Te

DochEvi [55]

Answer:

The decision is to not reject the null hypothesis.

At a significance level of 0.01, there is not enough evidence to support the claim that the proportion of all those using the drug that experience relief is significantly higher than 50% (P-value = 0.1443).

Step-by-step explanation:

This is a hypothesis test for a proportion.

The claim is that the proportion of all those using the drug that experience relief is significantly higher than 50%.

Then, the null and alternative hypothesis are:

$H_0: \pi=0.5\\\\H_a:\pi>0.5$

The significance level is 0.01.

The sample has a size n=200.

The sample proportion is p=0.54.

$p=X/n=108/200=0.54$

The standard error of the proportion is:

$\sigma_p=\sqrt{\dfrac{\pi(1-\pi)}{n}}=\sqrt{\dfrac{0.5*0.5}{200}}\\\\\\ \sigma_p=\sqrt{0.00125}=0.035$

Then, we can calculate the z-statistic as:

$z=\dfrac{p-\pi-0.5/n}{\sigma_p}=\dfrac{0.54-0.5-0.5/200}{0.035}=\dfrac{0.038}{0.035}=1.061$

This test is a right-tailed test, so the P-value for this test is calculated as:

$\text{P-value}=P(z>1.061)=0.1443$

As the P-value (0.1443) is greater than the significance level (0.01), the effect is not significant.

The null hypothesis failed to be rejected.

At a significance level of 0.01, there is not enough evidence to support the claim that the proportion of all those using the drug that experience relief is significantly higher than 50%.

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4 years ago