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NemiM [27]
3 years ago
8

Find the value of n in each of the following proportions.

Mathematics
1 answer:
Setler79 [48]3 years ago
7 0

Answer:

24

Step-by-step explanation:

18/n = 21/28                    You can cancel, but calculators make that unnecessary.   Cross multiply

21n = 18 * 28

21n = 504                         Divide by 21

n = 504 / 21

n = 24

==================

12/16 = n / 64                    Cross Multiply

16n = 12 * 64

16n = 768                         Divide by 16

n = 768/16

n = 48

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find three numbers whose sum is 32 if the second is 1 more than the first and the first is 4 less than the third
Alex777 [14]
X+y+z=32
x=z-4
y=x+1
z=x+4
x+x+1+x+4=32
3x+5=32
3x=27
x=9
y=10
z=13

Hope this helps :)
7 0
3 years ago
If in triangle ABC, a=5, b=6 and c=8, then cos A is...
s2008m [1.1K]

In a triangle, the nomenclature is that a variable side a is opposite of the angle A. we can use the cosine law to determine the value of cosine A. 
a2 = b2 + c2 -2bc cos a25 = 36 + 64 - 2*6*8 * cos acos a = 25/32 
5 0
4 years ago
Find the unit rate for 50 miles on 2 1/2 gallons
Anarel [89]
Unit rate is miles per 1 gallon
50mi/2 and 1/2 gallon
50mi/2.5 gallon
times 10/10
500mi/25 gallon
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answer is 20mi/gal
6 0
3 years ago
Your famous cookie recipe calls for
damaskus [11]

Answer:

I GOT -42 SO LIKE 4 1/2

Step-by-step explanation:

3 0
3 years ago
Help me with this please
meriva

Answer:

1) E

2) D

3) G

4) I

Step-by-step explanation:

1)

P = 2(l + w)

P = 2(3a + 3 + 8a - 12)

P = 2(11a - 9)

P = 22a - 18

2)

P = 22a - 18

P = 22(3) - 18

P = 66 - 18

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3)

P = a + b + c

P = 3b + 7 + 7b - 2 + 7b - 2

P = 17b + 3

4)

P = 17b + 3

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P = 102 + 3

P = 105

6 0
3 years ago
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