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bearhunter [10]
3 years ago
7

Find the least common denominator (LCD) of 1/20 and 11/30

Mathematics
2 answers:
Sergeu [11.5K]3 years ago
5 0

Answer:

60

Step-by-step explanation:

To find the LCD, all you have to do is find the least common multiple (LCM) of the two denominators.

The fractions are already reduced, so you have to find the LCM of 20 and 30. The LCM of 20 and 30 is 60.

<u>To find the LCM:</u>

20 and 30 are easy numbers, so you can just list the multiples out.

20: 20, 40, 60, etc.

30: 30, 60

The lists both have 60, so the LCM is 60.

Another way is to prime factorize the two numbers.

20: 2^2*5

30: 2*3*5

Then, take the non-repeating factor from the second number (3) and multiply that by 30, which is 60.

Mrrafil [7]3 years ago
3 0

Answer:

60

Step-by-step explanation:

LCD(1 /20 , 11 /30) = LCM(20, 30) = 22×3×5 = 60

1 /20 = 3 /60

11 /30  = 22 /60

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A

Step-by-step explanation:

5 0
3 years ago
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Your family goes to a Southern-style restaurant for dinner. There are 6 people in your family.
Viktor [21]

Answer:

Number of people who order chicken dinner = 1

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Step-by-step explanation:

Let

x = number of people who order chicken dinner

y = number of people who order the steak dinner

x + y = 6 (1)

14x + 17y = 99 (2)

From (1)

x = 6 - y

Substitute into (2)

14x + 17y = 99 (2)

14(6 - y) + 17y = 99

84 - 14y + 17y = 99

- 14y + 17y = 99 - 84

3y = 15

y = 15/3

y = 5

Substitute y = 5 into (1)

x + y = 6 (1)

x + 5 = 6

x = 6 - 5

x = 1

Number of people who order chicken dinner = 1

Number of people who order the steak dinner = 5

4 0
3 years ago
Translate eight subtracted from the product of fifteen and a number into a variable expression
Sophie [7]
If the number is taken as x,

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7 0
3 years ago
Can someone help me with this question?
elixir [45]

Answer:

A. the number of hours it takes for him to finish the race.

Step-by-step explanation:

If this answer is correct, please make me Brainliest!

3 0
2 years ago
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Can some one please help me to teach this to my daughter
EastWind [94]
28mi/1 hr = 28 mi/60 min = 1 mi/(60/28) min = 

28 mi/hr = 28 mi/60 min since there are 60 min in 1 hr
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