Can someone please help me with this question?

Olaf wants to buy a guitar that costs $600. He makes $3 per day. How many days will it take Olaf to save enough money to buy the

astraxan [27]

Answer:

200 days

Step-by-step explanation:

600/3 = 200

3x 200 = 600

8 0

3 years ago

Read 2 more answers

What times what equals 59

LUCKY_DIMON [66]

<span>The answer is 1 and 59. Number 59 is a prime number. That means that it has only two positive whole number factors - one and itself. Therefore, number 59, as the prime number, has two factors - 1 and 59. In other words, 1 times 59 equals 59.</span>

4 0

3 years ago

According to Inc, 79% of job seekers used social media in their job search in 2018. Many believe this number is inflated by the

Fynjy0 [20]

Answer:

Null hypothesis: $p\leq 0.79$

Alternative hypothesis: $p > 0.79$

$z=\frac{0.849 -0.79}{\sqrt{\frac{0.79(1-0.79)}{370}}}=2.786$

$p_v =P(z>2.786)=0.00267$

So the p value obtained was a very low value and using the significance level given $\alpha=0.05$ we have $p_v$ so we can conclude that we have enough evidence to reject the null hypothesis, and we can said that at 5% of significance the true proportion is higher than 0.79.

Step-by-step explanation:

1) Data given and notation

n=750 represent the random sample taken

X=314 represent the respondents that use social media in their job search.

$\hat p=\frac{314}{370}=0.849$ estimated proportion of respondents that use social media in their job search

$p_o=0.79$ is the value that we want to test

$\alpha=0.05$ represent the significance level

Confidence=95% or 0.95

z would represent the statistic (variable of interest)

$p_v$ represent the p value (variable of interest)

2) Concepts and formulas to use

We need to conduct a hypothesis in order to test the claim that the true proportion is hgiher than 0.79.:

Null hypothesis: $p\leq 0.79$

Alternative hypothesis: $p > 0.79$

When we conduct a proportion test we need to use the z statisticc, and the is given by:

$z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}}$ (1)

The One-Sample Proportion Test is used to assess whether a population proportion $\hat p$ is significantly different from a hypothesized value $p_o$ .

3) Calculate the statistic

Since we have all the info requires we can replace in formula (1) like this:

$z=\frac{0.849 -0.79}{\sqrt{\frac{0.79(1-0.79)}{370}}}=2.786$

4) Statistical decision

It's important to refresh the p value method or p value approach . "This method is about determining "likely" or "unlikely" by determining the probability assuming the null hypothesis were true of observing a more extreme test statistic in the direction of the alternative hypothesis than the one observed". Or in other words is just a method to have an statistical decision to fail to reject or reject the null hypothesis.

The significance level provided $\alpha=0.05$ . The next step would be calculate the p value for this test.

Since is a right tailed test the p value would be:

$p_v =P(z>2.786)=0.00267$

So the p value obtained was a very low value and using the significance level given $\alpha=0.05$ we have $p_v$ so we can conclude that we have enough evidence to reject the null hypothesis, and we can said that at 5% of significance the true proportion is higher than 0.79.

7 0

3 years ago

What is 3x=8x-15 I am trying to find the side length of a triangle.

svp [43]

Answer:

The value of x is 3.

Step-by-step explanation:

$3x = 8x - 15 \\ \frac{- 8x = - 8x \: \: \: \: \: \: \: \: \: \: \: \: \: }{ \frac{ - 5x}{ - 5} = \frac{ - 15}{ - 5} } \\ x = 3$

6 0

3 years ago

Which statement and reason can be used to complete the proof below to show that the pair of

stepladder [879]

Answer:

A. ΔANB~ΔYNX by AA (reasons/statements 2 and 3)

Step-by-step explanation:

∠ANB=∠YNX (vertically opposite) (3)

∠ABN=∠NXY (alternate angles) (2)

3 0

3 years ago