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JulsSmile [24]
3 years ago
10

In the accompanying diagram, isosceles triangle ABC has coordinates A(-4,0), B(4,0), C(0,4). Find the area of ABC.

Mathematics
1 answer:
kari74 [83]3 years ago
4 0

Answer:

The area of triangle ABC is 16\ units^{2}

Step-by-step explanation:

we know that

The area of a triangle is equal to

A=\frac{1}{2}(b)(h)

In this problem we have

b=AB=4-(-4)=8\ units ---> the length of the base b is the difference of the x-coordinates between A and B

h=OC=4-0=4\ units ---> the height h is the difference of the y-coordinates between C and the origin O

substitute the values in the formula

A=\frac{1}{2}(8)(4)

A=16\ units^{2}

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The cooking club made some pies to sell during lunch to make money to go on a field trip. The cafeteria helped by donating two p
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Answer:

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Step-by-step explanation:

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Hopefully this helps you :)

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3 years ago
Test the claim that the mean GPA of night students is larger than 3.1 at the .10 significance level. The null and alternative hy
Alborosie

Answer:

H 0 : μ = 3.1    H 1 : μ > 3.1

And this test is defined a a right tailed test since the symbol for the alternative hypothesis H1 is >.

t = \frac{3.13-3.1}{\frac{0.03}{\sqrt{75}}}= 8.66

df = n-1=75-1 =74

The p value is:

p_v = P(t_{74} >8.66) =3.65x10^{-13}

The significance level is: 0.1 or 10%

And since the p value is very low compared to the significance level we have enough evidence to:

Reject the null hypothesis

Step-by-step explanation:

For this case we want to test the claim that mean GPA of night students is larger than 3.1 at the .10 significance level. The claim needs to be on the alternative hypothesis so then we have the following system of hypothesis:

H 0 : μ = 3.1    H 1 : μ > 3.1

And this test is defined a a right tailed test since the symbol for the alternative hypothesis H1 is >.

We have the following info given:

\bar X = 3.13 , s =0.03 , n =75

The statistic to check the hypothesis is given by:

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

Replacing the info given we got:

t = \frac{3.13-3.1}{\frac{0.03}{\sqrt{75}}}= 8.66

The degrees of freedom are given by:

df = n-1=75-1 =74

The p value since is a right tailed ted is given by:

p_v = P(t_{74} >8.66) =3.65x10^{-13}

The significance level is 0.1 or 10%

And since the p value is very low compared to the significance level we have enough evidence to:

Reject the null hypothesis

6 0
3 years ago
PLZZZZ HELPPPPP<br> In your own words, define: point, line, ray, segment, plane.
Rudiy27

Answer:

point - a specific spot on the graph

line - a ray with both sides never ending

ray - a line with one side ending

segment - a specific piece of the line

plane - a never ending surface

Step-by-step explanation:

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Which correlation coefficient implies that the data points are closest to the line that is used to model the
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Answer:

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