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Ray Of Light [21]
3 years ago
11

If a/ b = 6/7 and a/c = 2/5 , what is the value of 3b+c in terms of a?

Mathematics
2 answers:
Nookie1986 [14]3 years ago
6 0
Not sure. has the same question
777dan777 [17]3 years ago
6 0
<h3>Answer:  6a</h3>

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

Explanation:

Solve the first equation for b

a/b = 6/7

7a = 6b ... cross multiply

6b = 7a

b = 7a/6 ... divided both sides by 6

------

Solve the second equation for c

a/c = 2/5

5a = 2c

2c = 5a

c = 5a/2

------

We found that

  • b = 7a/6
  • c = 5a/2

both are in terms of a

So,

3b+c = 3(7a/6) + 5a/2

3b+c = 21a/6 + 5a/2

3b+c = 7a/2 + 5a/2

3b+c = (7a+5a)/2

3b+c = 12a/2

3b+c = 6a

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Wewaii [24]

Answer:

2 1/4

Step-by-step explanation:

Number 1 is incorrect because 1/4 x 9 is 2 1/4 not 1 1/4.

To multiply fractions, multiply directly across. So multiply 1/4 x 9/1 to get 9/4 which converted into a mixed number is 2 1/4.

5 0
2 years ago
Please help with answers I need them as soon as possible!
Tcecarenko [31]
5 because 5/6 is equal to 15/18
8 0
3 years ago
The answer for the simplest form
grigory [225]
The simplest form is 11/24.
3 0
3 years ago
Scrieti rezultatul sub forma de fractie ireductabila : a)1/4+5/4; b) 23/17+11/17;c) 16/93+15/93;11/14+23/14;3/16+ 15/16 ; 1 1/8+
Alborosie

Answer:

See explanations below

Step-by-step explanation:

a) 1/4+5/4

= (1+5)/4

= 6/4

= 3/2

b) 23/17+11/17

= (23+11)/17

= 34/17

= 2

c) 16/93+15/93

= (16+15)/93

= 31/93

= 1/3

d) 11/14+23/14

= (11+23)/14

= 34/14

= 17/7

e) 3/16+15/16

= (3+15)/16

= 18/16

= 9/8

f) 1 1/8 + 1 3/8

= 9/8 + 11/8

= (9+11)/8

= 20/8

= 5/2

g) 1 3/10+3 1/10;

= 13/10+31/10

= (13+31)/10

= 44/10

h) 2 3/5+3 2/5

= 13/5+17/5

= (13+17)/5

= 30/5

= 6

7 0
3 years ago
If the area of a square is 100 cm2, what is the perimeter?<br>​
Vitek1552 [10]

Answer:

40

Step-by-step explanation:

To find the perimeter, first we need to find the side lengths.

If 100 cm is the area then we need to find what number squared is 100

10 x 10 = 100

So 10 is the side length. P= s + s + s +s

10 + 10 + 10 +10 = 40

6 0
3 years ago
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