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Zigmanuir [339]
3 years ago
6

Do u need a common denominator if you have adding and dividing in fractions? 

Mathematics
2 answers:
Igoryamba3 years ago
8 0
No you don't because you use the reciprocal and then multiply to divide the fractions, not a common denominator, you need that when there are different denominators and you are adding/subtracting
Rama09 [41]3 years ago
4 0
You only need a common denominator for adding and subtracting! <span />
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Oksi-84 [34.3K]

Sorry, misunderstood question, answer beneath me much better.

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3 years ago
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Sales tax 7% how much will I be charged on a $85
CaHeK987 [17]
Tax= 85 times 7% = 85 times 0.07

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3 years ago
If you can run 2/5 of a mile in 1/2 hour, how far can you run in 1 1/2 hours?​
forsale [732]

Answer:

1 1/5 or 6/5

Step-by-step explanation:

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2 years ago
A) If the 5th term of an A.P. is double the 7th term, show that the sum of the 17 terms zero.​
gayaneshka [121]

Answer:

see explanation

Step-by-step explanation:

The nth term of an AP is

a_{n} = a₁ + (n - 1)d

where a₁ is the first term and d the common difference

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a₁ + 4d = 2(a₁ + 6d) , that is

a₁ + 4d = 2a₁ + 12d ( subtract a₁ from both sides )

4d = a₁ + 12d ( subtract 12d from both sides )

- 8d = a₁

The sum of n terms of an AP is

S_{n} = \frac{n}{2} [ 2a₁ + (n - 1)d ] , substitute values

S_{17} = \frac{17}{2} ( 2(- 8d) + 16d)

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     = 8.5 × 0

     = 0

5 0
2 years ago
If the point P(-4/5,y) lies on the unit circle and P is in the third quadrant, what does y equal? If necessary, use the slash ma
aleksandr82 [10.1K]
We use the fact that x2+y2=1  This is the equation of the unit circle.
We know that x=-4/5, so plug this in and solve for y
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y = -3/5
8 0
3 years ago
Read 2 more answers
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