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zysi [14]
3 years ago
10

For the equation: – 36 – 4r = -2(-6 + 6r), what is the value of r?

Mathematics
2 answers:
horrorfan [7]3 years ago
8 0

Answer:

r = 6

Step-by-step explanation:

– 36 – 4r = -2(-6 + 6r)

+36               +36

----------------------------------

-4r = -12r + 48

+12r     +12r

----------------------------------

8r = 48

/8     /8

----------------------------------

r = 6

zmey [24]3 years ago
4 0

Answer:

r = 6

Step-by-step explanation:

– 36 – 4r = -2(-6 + 6r)

-36 - 4r = 12 - 12r

-48 - 4r = -12r

-48 = -8r

r = 6

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In how many ways can Susan arrange 7 books into 5 slots on her bookshelf?
KatRina [158]

Answer:

  • 2520

Step-by-step explanation:

This is permutation question

<u>The formula for it: </u>

  • N = b!/(b-s)!, where N- number of ways, b- number of books, s- number of slots

<u>Finding the answer:</u>

  • N = 7!/(7-5)! = 7!/2! = 7*6*5*4*3 = 2520
7 0
3 years ago
IfA=(-2,-4) and B=(-8,4), what is the length of AB?
lisabon 2012 [21]

Answer:

<h2>10 units </h2>

solution,

A(-2,-4)--->(X1,y1)

B(-8,4)----->(x2,y2)

now,

ab =  \sqrt{(x2 - x1) ^{2}  +  {(y2 - y1)}^{2} }  \\  \:  \:  \:  \:  =  \sqrt{ (- 8 - ( - 2)) ^{2} + (4 - ( - 4))  ^{2} }  \\  \:  \:  \:  =  \sqrt{( - 8 + 2) ^{2} +  {(4 + 4)}^{2}  }  \\  \:  \:  \:  =  \sqrt{( - 6) ^{2} +  {(8)}^{2}  }  \\  \:  \:  =   \sqrt{36 + 64}  \\  \:  \:  \:  =  \sqrt{100}  \\  \:  \:  \:  =  \sqrt{ {(10)}^{2} }  \\  \:  \:  \:  \:  = 10 \: units

Hope this helps..

Good luck on your assignment

3 0
3 years ago
9 ft 8 ft 5 ft 13 ft What is the area of this figure? ​
Vlad1618 [11]

Answer:

D. 98 ft.^2

Step-by-step explanation:

A= b*h

=13*8

=104 ft.^2

Because there is a piece missing, we know it must be under 104 ft.^2. They didn't give us enough information to find the complete area of the missing triangle, so I used the process of elimination. With the responses given and this information, we can assume that the answer is 98 ft.^2.

8 0
3 years ago
What is the ethnic makeup of Brazil
siniylev [52]

Answer:

white 47.7%, mulatto (mixed white and black) 43.1%, black 7.6%, Asian 1.1%,

Step-by-step explanation:

white 47.7%,

mulatto (mixed white and black)

43.1%, black 7.6%,

Asian 1.1%,

5 0
3 years ago
Read 2 more answers
5x-4=-3-x so ya can yall help
Ket [755]

Step-by-step explanation:

5x-4=-3-x

5x+x=4+(-3)

6x=1

x=1/6

4 0
3 years ago
Read 2 more answers
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