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Stels [109]
3 years ago
15

What is the area of the parallelogram represented by the vertices A(-6, -1), B(-2, -1), C(-1,-4) and D(-5, -4)?

Mathematics
2 answers:
posledela3 years ago
6 0

\huge\underline\blue{✏ANSWER}

(no answer found.)

(maybe can found on other apps?)

<u>#BrainliestBunch</u>

Vera_Pavlovna [14]3 years ago
6 0

Answer:

12

Step-by-step explanation:

1) Vector AB (-2-(-6); -1-(-1))= (4; 0). Vector module is module AB=sqrt (4*4+0*0)= 4

2) The module of Vector BC is sqrt((-1-(-2))*(-1 - (-2))+ (-4-(-1))* (-4-(-1))= sqrt (9+1)= sqrt 10.

3) The module of AC is sqrt ((-1-(-6))*(-1-(-6))+ (-4-(-1))*(-4-(-1))= sqrt (25+9)= sqrt 34.

4) Having the triangle with the sides AB, BC, AC use the theorem of cos:

sqrt34*sqrt34= sqrt 10*sqrt 10 + 4*4- 2*sqrt10*4*cosB

34-10-16= -8 sqrt 10*cosB

c0sB= (-1)/ sqrt10

5) Find out sinB that is equal to Sqrt (1- ((-1)/sqrt 10)* ((-1)/sqrt10))= sqrt (9/10)= 3/sqrt10.

6)S= 4*sqrt10*3/sqrt10= 4*3=12. The area is equal to 12.

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The exponent is 5 because a exponent is what the number times itself like 3^2 is 9.

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TiliK225 [7]

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20 : 100% = x : 115%

Step-by-step explanation:

Do 115 x 20

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3 years ago
Suppose a researcher is interested in determining if there is a relationship between low birth weight and pediatric pneumonia. I
MissTica

Answer:

He will need 4 newborns in the sample to be 95% confident.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1-0.9}{2} = 0.05

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

So it is z with a pvalue of 1-0.05 = 0.95, so z = 1.645

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646 = 1.645*\frac{746}{\sqrt{n}}

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7 0
3 years ago
Dont know where to start any help please<br><br><br> solve for u<br><br> 8=u/12.8
kherson [118]
8 × 12,8 = u
102,4 = u
8 0
4 years ago
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-22 = 6x + 4<br> Hehehhe I need help agaaaaiiin
UkoKoshka [18]

Hey there!

Answer:\boxed{x=\frac{-13}{3}}

Explanation:

-22=6x+4

Let's start off with flipping the equation.

6x+4=-22

Now we need to subtract 4 from both sides of the equation.

6x+4-4=-22-4\\6x=-26

Now in our third/last step, we will divide both sides by 6.

\frac{6x}{6}=\frac{-26}{6}

x=\frac{-13}{3}

\boxed{x=\frac{-13}{3}}\text{ is the answer.}

Hope this helps!

\text{-TestedHyperr}

3 0
3 years ago
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