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polet [3.4K]
3 years ago
10

If 1 is added in numerator and denominator then a fraction changes to 4. If 1 is subtracted from the numerator and denominator,

fraction changes to 7. Numerator of the fraction is
Mathematics
1 answer:
viva [34]3 years ago
7 0

Answer:

N=15

Step-by-step explanation:

N=numerator

D=denominator

(1+N)/(1+D)=4

(N-1)/(D-1)=7

(1+N)=4(1+D)

N=4D+3

(4D+3-1)/(D-1)=7

4D+2=7(D-1)

4D-7D=-2-7

D=-9/-3=3

N=4D+3=15

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3 years ago
A stadium has 39 sections. there are 18 sections that each have 478 seats. The remaining sections each have 292 seats. If 13,528
vesna_86 [32]

Answer: 1,208 seats

Step-by-step explanation:

39-18= 21

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6 0
3 years ago
What is the solution of sqrt x+2-15=-3
antiseptic1488 [7]

Answer:

Step-by-step explanation:

Without brackets, we are not exactly sure what is under the root sign. There are 3 choices.

sqrt(x) + 2 - 15 = - 3

sqrt(x + 2) - 15 = - 3

sqrt(x + 2 - 15) = - 3

I think the middle one is what you intend. If not leave a note.

sqrt(x + 2) - 15 = - 3                Add 15 to both sides.

sqrt(x + 2) - 15+15 = - 3+15     Combine

sqrt(x + 2) = 12                        Square both sides

x + 2 = 12^2                             Do the right

x + 2 = 144                               Subtract 2 from both sides.

x + 2-2 = 144-2

x = 142

3 0
3 years ago
Sixty percent means the same as _______.
ycow [4]
60% - 3/5
Hope this help, don't really know what your expecting the answer to be

3 0
3 years ago
here’s a graph of the equation x + 3y = 6 select all coordinates pairs that represent a solution to the equation A) 0,2 B) 0,6 C
Afina-wow [57]

Answer:

(0,2) (3,1)

Step-by-step explanation:

5 0
3 years ago
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