the least common multiple of 3, 6,9 i say 18

Sheila practiced hours Monday, hours Tuesday, and hours Wednesday. What is the total number of hours that she practiced?

A) hours B) hours C) hours D) 6 hours

Complete the statement, using the symbol < or >.

0.6

A) > B) <

Jon spent of his study time doing math homework and preparing for a history exam. What fraction of his study time remains?

A) B) C) D)

Your first answer is correct.

But, you seem to have left out important information in the other two questions.

1 1/2 hours 3 3/4 2 1/4 the anwers you can chose from are

a. 7 1/2 hours
b. 5 1/4
c. 8 1/2 hours
d. 6 hours

jon spent 1/3 of his time 2/7 preparing the following you can chose from A) 13/21 B) 5/21 C) 1/21 D) 8/21

1 1/2 + 3 3/4 + 2 1/4 =

1 2/4 + 3 3/4 + 2 1/4 = 6 6/4 = 7 1/2

1/3 + 2/7 = 7/21 + 6/21 = 13/21

21/21 - 13/21 = ??

To find the least common multiple (LCM) of a set of numbers, we can use the method of prime factorization.

To find the prime factors of 3, we observe that 3 itself is a prime number. So the prime factorization of 3 is simply 3.

To find the prime factors of 6, we can divide it by the smallest prime number, which is 2. 6 divided by 2 is 3. Dividing 3 by any other prime numbers does not give an integer quotient. So the prime factorization of 6 is 2 * 3.

To find the prime factors of 9, we again divide it by the smallest prime number, which is 3. 9 divided by 3 is 3. Dividing 3 by any other prime numbers does not give an integer quotient. So the prime factorization of 9 is 3 * 3.

Now, to find the LCM, we multiply each prime factor the highest number of times it occurs in any of the given numbers. In this case, we have one 2 and two 3's. So the LCM of 3, 6, and 9 is 2 * 3 * 3, which equals 18. Therefore, your answer of 18 is correct.

For the second question, we are given the number of hours Sheila practiced on Monday, Tuesday, and Wednesday. Let's call these numbers x, y, and z respectively.

To find the total number of hours she practiced, we simply need to add the individual hours together: x + y + z.

Unfortunately, you didn't provide the specific values for x, y, and z. So it is not possible to determine the total number of hours Sheila practiced without that information.

For the third question, we are asked to determine whether 0.6 is greater than or less than 1.

To do this, we compare the decimal number to 1.

Since 0.6 is less than 1, the correct answer is B) < (less than).

For the fourth question, we are given the fractions representing the amount of time Jon spent on math homework and preparing for a history exam, and we need to find the fraction representing the remaining study time.

Let's call the fraction representing the time Jon spent on math homework x/y and the fraction representing the time he spent preparing for the history exam u/v.

To find the amount of time remaining, we need to subtract the time spent on math homework and history exam preparation from the total study time, which is 1.

The remaining study time can be calculated as follows: 1 - (x/y + u/v).

Unfortunately, you didn't provide the specific fractions for x/y and u/v. So it is not possible to determine the fraction representing the remaining study time without that information.