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Marysya12 [62]
3 years ago
9

What is the least common multiple for 3,5,and 7

Mathematics
1 answer:
bazaltina [42]3 years ago
5 0
The least common multiple means that the least multiple that the numbers have in common. So you can make a little chart with each of the numbers multiples like so..
3,6,9,12,15,18,21,24,27,30,33,36,39,42,45,48,51,54,57,60,63,66,69,
(Just added 3 each time)
5,10,15,20,25,30,35,40,45,50,55,60,65,70,
(Just added 5 each time)
7,14,21,28,35,42,49,56,63,70,77
(Just added 7 each time)
No we can go and look through the multiples and see what number they all have that's the same! You might have to keep added on multiples until you find some that are alike! You'll eventually reach 105 for each of the numbers and see that that's the first one that they have that's the same!! So 105 would be your least common multiple!
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a stadium shaped like a hemisphere with a radius of 150 feet. last month the owners of the stadium paid $0.05 per cubic foot to
lesantik [10]

The formula for volume of a hemisphere is: V = 2/3 * π * r³

Volume = 2/3 x 3.14 x 150^3

Volume = 7,065,000 cubic feet.

Multiply the cost per cubic foot by the volume:

7,065,000 x 0.05 = 353,250

The total cost was $353,250

6 0
3 years ago
Determine the circumference of a circle with a radius of 6.8. Round your answer to the tenths place.
Eva8 [605]

Answer:

42.73

Step-by-step explanation:

2*pi*r = 2*pi*6.8=42.73

5 0
2 years ago
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Solve for w 8/5w =40 whats the answer , whats w its in a fraction w is by the fraction
densk [106]

Answer:

So first, you have to isolate w. You can do this by getting rid of the 8/5.

This will get you to: w = 25

7 0
3 years ago
One day for plumbers in five helpers earned $350. At the same rate of pay, another group of five plumbers and six helpers earned
schepotkina [342]

Answer: a plumber earns $50 each day and a helper earns $30 each day.

Step-by-step explanation:

Let x represent the amount that a plumber earns in a day.

Let y represent the amount that a helper earns in a day.

One day, four plumbers and five helpers earned $350. This means that

4x + 5y = 350 - - - - - - - - - - -1

At the same rate of pay, another group of five plumbers and six helpers earned $430. This means that

5x + 6y = 430 - - - - - - - - - - - - 2

Multiplying equation 1 by 5 and equation 2 by 4, it becomes

20x + 25y = 1750

20x + 24y = 1720

Subtracting, it becomes

y = 30

Substituting y = 30 into equation 1, it becomes

4x + 5 × 30 = 350

4x + 150 = 350

4x = 350 - 150

4x = 200

x = 200/4 = 50

3 0
3 years ago
Two gears are connected and are rotating simultaneously. The smaller gear has a radius of 2 inches, and the larger gear has a ra
sleet_krkn [62]

Answer:

Let r represent the radius of the smaller circle and R the radius of the larger circle.

Apply ratios: the radius of smaller circle to radius of larger circle, i.e.

r: R = 3 : 7.

I complete rotation = 360 degrees.

Part 1:

For one complete rotation of the smaller circle, the larger circle is rotated through: (3/7)*(360) = 154.3 degrees

Part 2:

For one complete rotation of the larger circle, the larger circle is rotated through: (7/3)*(360) = 840.0 degrees

This is equivalent to (840/360) = 2.3 rotations

Alternatively, use the ratios:

The number of rotations = R/r = 7/3 = 2.3 rotations  

BRAINLIEST PLEASE??

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
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