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3 years ago

Find the least common denominator for these two rational expressions 7/n^2 -8/7n

Mathematics

1 answer:

lianna [129]3 years ago

8 0

Answer:

7n²

Step-by-step explanation:

7/n² - 8/7n

Least common multiple will be the least common denominator

L.C.M = 7n²

Dividing the L.C.M by denominators and multiplying with numerators;

((7×7) - (n×8))/7n²

= (49 - 8n)/7n²

7n² is the least common denominator

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dem82 [27]

$\bold{ANSWER:}$
D. 12

$\bold{EXPLANATIONS:}$

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7 + 4 + 1 = 12

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2 years ago

Bob took his family out to lunch. He bought 3 hot dogs and 2 hamburgers for $11. If the guy in front of him bought 2 hot dogs an

Dafna11 [192]

Answer:

Hotdog: $1.50

Hamburger: $3.25

Step-by-step explanation:

You write down the 2 equations based off of the information as I did:

Let x = cost of a hotdog

Let y = cost of a hamburger

and so:

3x + 2y = 11

2x + 4y = 16

Now, we need to find x and y:

We will make both equations equal to y to compare them to each other.

2y = 11 - 3x

y = 5.5 - 1.5x

4y = 16 - 2x

y = 4 - 0.5x

4 - 0.5x = 5.5 - 1.5x

x = $1.5

Now plugging in x into the equation:

2(1.5) + 4y = 16

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y = $3.25

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3 years ago

Hannah is going to roll two dice.

krok68 [10]

Answer:

14 /36

Step-by-step explanation:

1. 2. 3. 4. 5. 6.

1 1,1. 1,2. 1,3. 1,4 1,5. 1,6

2. 1,2. 2,2. 2,3. 2,4. 2,5. 2,6

3 1,3. 3,2. 3,3 3,4. 3,5. 3,6

4 1,4. 2,4. 3,4. 4,4. 4,5. 4,6

5. 1,5. 2,5. 3,5. 4,5. 5,5. 6,5

6 1,6. 2,6. 3,6. 4,6. 5,6. 6,6

There are 36 possible outcomes, and 14 of those meet your constraint/what the question is asking.

Hope this helps!

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4 years ago

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djyliett [7]

Answer:

Step-by-step explanation:

The last three are irrational but I'm not sure about the first four.

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3 years ago

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Papessa [141]

Wait is this the problem?

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3 years ago

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