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slavikrds [6]
3 years ago
12

Suppose the teacher begins recording on a digital camera with an hour available. Show that there is enough time to record everyo

ne if she gives a 15 minute introduction at the beginning of class and every student takes a minute to get ready.
________________________________How much time is left on the digital camera?
________________________________
Mathematics
1 answer:
kogti [31]3 years ago
5 0
22. Suppose that the teacher started recording on a digital camera with an hour available. She gives 15 minutes introduction. Thus 60 minutes – 15 minutes is 45 minutes. She still have 45 minutes remaining, now the question is how many minutes will remain if she uses 1 minutes per students. Since the number of students is not given. It depends on how many students will be there. For example 25 students thus that’s equals to 25 minutes also. So she has a 20 minutes remaining.,
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find the least perfect square that is exactly divisible by each of the numbers 5 , 18 , 25 and 27 . ​
Dimas [21]
<h3>☂︎ Answer :- </h3>

  • 8100
<h3>☂︎ Solution :- </h3>

  • LCM of 5 , 18 , 25 and 27 = 2 × 3³ × 5²
  • 2 and 3 have odd powers . To get a perfect square, we need to make the powers of 2 and 3 even . The powers of 5 is already even .

In other words , the LCM of 5 , 18 , 25 and 27 can be made a perfect square if it is multiplied by 2 × 3 .

The least perfect square greater that the LCM ,

☞︎︎︎ 2 × 3³ × 5² × 2 × 3

☞︎︎︎ 2² × 3⁴ × 5²

☞︎︎︎ 4 × 81 × 85

☞︎︎︎ 100 × 81

☞︎︎︎ 8100

8100 is the least perfect square which is exactly divisible by each of the numbers 5 , 18 , 25 , 27 .

7 0
2 years ago
It says factor each expression 49x-28?
NARA [144]

Answer:

7(7x -4)

Step-by-step explanation:

49x-28

We can factor a 7 from each term

49x = 7*7x

28 = 7*4

7(7x -4)

3 0
3 years ago
Can someone help me and please explain how you did it
nikitadnepr [17]

Answer:

Radius: 7

Diameter: 14

Area Formula: π r^2

Area Answer: 154 ft^2

Step-by-step explanation:

Radius: 14/2 = 7

The radius is always half the diameter.

Area Work

A = π(7)^2

A = π(49)

A = 153.9380 ft^2

3 0
3 years ago
What number is 7 units to the left of -1?<br><br> a.6<br> b.-6<br> c.-8<br> d.8
drek231 [11]

1 unit to the left of -1 on the number line is -2.

Thus, 7 units to the left of -1 is -8.

The appropriate choice is ...

... c. -8

6 0
3 years ago
Read 2 more answers
Select the equation where x = 6 is a solution.
olga55 [171]

Answer: D 5x=30

Step-by-step explanation

You just substitute 6 into the equations to see if they make the equation true.

8 0
3 years ago
Read 2 more answers
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