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3 years ago

Name two types of graphs that use a key to determine what the data is representing. ? AND ?

Mathematics

1 answer:

Grace [21]3 years ago

8 0

Pie charts , bar charts. by the way i LOVEEEE your profile picture top omggggg <3

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Give the value of x. Explain how you got your answer OR which theorem you used.

PilotLPTM [1.2K]

100+75+70+x= 360° (sum of interior angles of quadrilateral)

x= 360-245= 115°

5 0

3 years ago

WILL MARK BRAINIEST Bob cannot decide which of two washing machines to buy. The selling price of each is $495. The first is mar

sashaice [31]

Answer:

See explanation

Step-by-step explanation:

495*.3= 148.5

495-99(20%)

396-10%

The first one is cheaper and the 2nd sucks cux the 20 then 10 means the 10% off is of the 20 and is lower and lower means lesss $ off

3 0

2 years ago

What arithmetic variables look like

juin [17]

Answer:

LETTERS

Step-by-step explanation:

In Arithmetic, variables look like LETTERS.

5 0

3 years ago

The current population of Burlington, Maine, is 360 and grows at a rate of 2% per year. Which equation could be used to determin

satela [25.4K]

Your answer would be A. 450 = 360(1.02)

8 0

3 years ago

A survey of 85 families showed that 36 owned at least one DVD player. Find the 99% confidence interval estimate of the true prop

attashe74 [19]

Answer:

$0.424 - 2.58\sqrt{\frac{0.424(1-0.424)}{85}}=0.286$

$0.424 + 2.58\sqrt{\frac{0.424(1-0.424)}{85}}=0.562$

The 99% confidence interval would be given by (0.286;0.562)

Step-by-step explanation:

Information given:

$X= 36$ represent the families owned at least one DVD player

$n= 85$ represent the total number of families

$\hat p=\frac{36}{85}= 0.424$ represent the estimated proportion of families owned at least one DVD player

In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 99% of confidence, our significance level would be given by $\alpha=1-0.99=0.01$ and $\alpha/2 =0.05$ . And the critical value would be given by:

$z_{\alpha/2}=-2.58, z_{1-\alpha/2}=2.58$

The confidence interval for the mean is given by the following formula:

$\hat p \pm z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}$

If we replace the values obtained we got:

$0.424 - 2.58\sqrt{\frac{0.424(1-0.424)}{85}}=0.286$

$0.424 + 2.58\sqrt{\frac{0.424(1-0.424)}{85}}=0.562$

The 99% confidence interval would be given by (0.286;0.562)

8 0

3 years ago