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3 years ago

Help! giving brainlest thx!

Mathematics

2 answers:

leonid [27]3 years ago

7 0

Answer:

The first answer is the last one and the other is the third

Step-by-step explanation:

the the first one is in obtuse because this wider than 90° and the other one is shorter than 90°

kipiarov [429]3 years ago

6 0

Answer:

The first one is an Obtuse triangle and the second is an Acute isosceles triangle :)

Step-by-step explanation:

Hope this helped!

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Lexi asked 325 students which fruit they preferred, bananas or pineapples. 200 students said they preferred pineapples. What per

Serjik [45]

Answer:

38.46%

Step-by-step explanation:

Given,

The total number of students = 325

The number of students preferred pineapples = 200

Therefore, The number of students preferred bananas = (325 - 200) = 125

Among 325 students, banana is preferred 125 students

Among 1 student, banana is preferred 125/325 students

Among 100 students, banana is preferred (125*100)/325 students

= 500/13

= 38.46% (2 decimal places)

5 0

3 years ago

What measure of center best represents the data set? Drag and drop the correct answer into the box. Data Set Best Measure of Cen

Blababa [14]

Answer:

Mean or Median.

Step-by-step explanation:

The mean and the median are both equal to 27.

Therefore the answer is,

mean or median.

3 0

3 years ago

Read 2 more answers

Plz i need help and asap plus work pls and no files

AnnZ [28]

Answer:

25%

Step-by-step explanation:

so out of 32 marbles, 8 of them are red. This means the rest are blue which is 24 blue. To make a percentage, all you do is make a fraction. out of 32, 8 were red so 8/32. Fractions are basically division so 8/32 is 0.25. This means 25%.

3 0

3 years ago

A manufacturer of coffee vending machines has designed a new, less expensive machine. The current machine is known to dispense (

cupoosta [38]

Answer:

$t=(15-1) [\frac{0.219}{0.2}]^2 =16.7864$

$p_v = 2*P(\chi^2_{14}>16.786)=0.5355$

And the 2 is because we are conducting a bilateral test.

$\alpha=0.05$ since the the $p_v >0.05$ we fail to reject the null hypothesis.

$\alpha=0.01$ since the the $p_v >0.01$ we fail to reject the null hypothesis.

Step-by-step explanation:

Data given

$\mu=7$ population mean (variable of interest)

$\sigma=0.2$ represent the population standard deviation

$s=0.219$ represent the sample deviation

n=15 represent the sample size

$\alpha=0.05,0.01$ represent the values for the significance level

Hypothesis test

On this case we want to check if the population standard deviation is equal or not to 0.2, so the system of hypothesis are:

H0: $\sigma = 0.2$

H1: $\sigma \neq 0.2$

In order to check the hypothesis we need to calculate the statistic given by the following formula:

$t=(n-1) [\frac{s}{\sigma_o}]^2$

This statistic have a Chi Square distribution distribution with n-1 degrees of freedom.

What is the value of your test statistic?

Now we have everything to replace into the formula for the statistic and we got:

$t=(15-1) [\frac{0.219}{0.2}]^2 =16.7864$

P value

We know the degrees of freedom of the distribution 14 on this case and we can find the p value like this:

$p_v = 2*P(\chi^2_{14}>16.786)=0.5355$

And the 2 is because we are conducting a bilateral test.

$\alpha=0.05$ since the the $p_v >0.05$ we fail to reject the null hypothesis.

$\alpha=0.01$ since the the $p_v >0.01$ we fail to reject the null hypothesis.

3 0

3 years ago

Write 90% as a decimal. Round to the thousandths place

dybincka [34]

90% = 90/100 = 9/10 = 0.9
Hope this helps :)

4 0

3 years ago

Read 2 more answers