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2 years ago

What you know? Thanks

Mathematics

2 answers:

Paul [167]2 years ago

8 0

Answer:

∠ EAC = 50°

Step-by-step explanation:

Since AE is an angle bisector of ∠ BAC , then

∠ EAC = ∠ BAE , that is

3x - 10 = x + 30 ( subtract x from both sides )

2x - 10 = 30 ( add 10 to both sides )

2x = 40 ( divide both sides by 2 )

x = 20

Then

∠ EAC = 3x - 10 = 3(20) - 10 = 60 - 10 = 50°

Nutka1998 [239]2 years ago

5 0

Answer:

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If f(1)=3 and f(n)=-2f(n-1)+1,then f(5)=

Drupady [299]

F(5) = - 2f(4) + 1
f(4) = -2f(3) + 1
f(3) = -2f(2) + 1
f(2) = -2f(1) + 1
Therefore:
f(2) = -2(3) + 1 = -5
f(3) = -2(-5) + 1 = 11
f(4) = -2(11) + 1 = -21
Therefore f(5) = -2(-21) + 1 = 43

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3 years ago

Associations In Data:Question 10

Karo-lina-s [1.5K]

Answer:

$\bar X = \frac{62+63+68+72+79+80+83+93+94+95}{10}= 78.9$

$|62-78.9| = 16.9$

$|63-78.9| = 15.9$

$|68-78.9| = 10.9$

$|72-78.9| = 6.9$

$|79-78.9| = 0.1$

$|80-78.9| = 1.1$

$|83-78.9| = 4.1$

$|93-78.9| = 14.1$

$|94-78.9| = 15.1$

$|95-78.9| = 16.1$

$MAD = \frac{\sum_{i=1}^n |X_i -\bar X|}{n}$

And replacing we got:

$MAD =\frac{16.9+15.9+10.9+6.9+0.1+1.1+4.1+14.1+15.1+16.1}{10}= 10.12$

And the best anwer is

10.12

Step-by-step explanation:

We have the following data given:

62 63 68 72 79 80 83 93 94 95

And we need to begin finding the mean with the following formula:

$\bar X = \frac{\sum_{i=1}^n X_i}{n}$

And replacing we got:

$\bar X = \frac{62+63+68+72+79+80+83+93+94+95}{10}= 78.9$

Now we can find the mean absolute deviation like this:

$|62-78.9| = 16.9$

$|63-78.9| = 15.9$

$|68-78.9| = 10.9$

$|72-78.9| = 6.9$

$|79-78.9| = 0.1$

$|80-78.9| = 1.1$

$|83-78.9| = 4.1$

$|93-78.9| = 14.1$

$|94-78.9| = 15.1$

$|95-78.9| = 16.1$

And finally we can find the mean abslute deviation with the following formula:

$MAD = \frac{\sum_{i=1}^n |X_i -\bar X|}{n}$

And replacing we got:

$MAD =\frac{16.9+15.9+10.9+6.9+0.1+1.1+4.1+14.1+15.1+16.1}{10}= 10.12$

And the best anwer is

10.12

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3 years ago

On a map of Alabama, one inch is equivalent to 100 miles. If the distance between two towns is 0.5 inches on the map, what is th

olchik [2.2K]

Answer:

Step-by-step explanation:

The ratio is

1 inch : 100 miles

0.5 inch : X miles

1/100 = 0.5/X

X = 0.5 ÷ 1/100

X = 0.5 × 100/1

X = 50

8 0

3 years ago

Read 2 more answers

Point A is at (-2,-2)?<br> true or false

vladimir1956 [14]

A= (2,-2)
B= (-2,-2)
C=(2,4)
D=(-2,2)

if this helped Brainliest me on this answer it helps alot :))

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1 year ago

The length of a rectangle is 6 cm and its area is (6x+18) Square centimeters what is an expression for the width

Ludmilka [50]

Answer:

x+3

Step-by-step explanation:

(6x+18)/6

Simplify

x+3

7 0

3 years ago