Hi right now im doing homework about common denominators and for some reason I cant understand how to do it

Answers

Answer 1

Answer: It would be great if you added some more details, but for common denominators you try to find the least common number that the 2 or more of the numbers you got have!
For example:
1/2 and 2/3 if you multiply 2 by 3 and 3 by 2, they both are 6, so you would multiply 1/2 both by 3 to make it into 3/6 and 2/3 by 2 to make it into 4/6!

Answer 2

Answer: basically you have to find the lcm for the common denominator so that you can add/subtract them

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List the factors of 15 and 30. Indicate which factors are common to both numbers and the Greatest Common Factor (GCF). 15= ___________ 30= ____________ Common= ____________ GCF= _______
What is 3/5 + 2/9 -equals
if a helicopter at 2,000 meters begins to descend at 3 meers per second, how far is the helicopter from the ground after a minute a half
A) Estimate 49% of 162.b) Use mental math to calculate 49% of 162.

What is 9 times as many square feet as 81

Answers

I think you multiply 81 and 9 then divide 3 then it = 243

81•9= 729 divide by 3= 243

45 laptops out of 109 computer

Answers

Answer:

Here's how you write it:

109

Answer:

I think its sixty four.

Let r>0 -π<θ<π be real. Calculate all the values of $Re( (ln(z))/(z))$

where $z=r(cos(\theta)+sin(\theta))$ .

Answers

For a real z, ln(z)/z is always a real number, so the Re() is quite useless.

Thus we just need to write $ln(z)/z=ln(r)+ln(\cos(\theta)+\sin(\theta))$ , and we can't simplify any more.

What is the answer? and why is that the answer?

Answers

Since you have a ratio of how many galleons to galleys were in the Spanish Armada, the information you would need to find the total amount of galleons and galleys would be how many the Armada had of one of the two kinds.

For example, if we know that the Armada had 100 galleons, then we can use the ratio of 5 galleons : 1 galley to find out how many galleys it had. Then we can add the two numbers to find out how many ships total.

So, you need either the amount of galleons, or the amount of galleys in order to figure out the total amount of galleons and galleys in the Spanish Armada.

A bag contains 5 black marbles, 9 white marbles, and 2 red marbles. One marble is to be chosen at random. What is the probability that the chosen marble will be red?

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2/16
BC there are 2 red marbles out of 16 marbles in total

(6/20)(5/19)!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

your model train has one engine and eight train cars. find the total number of ways you can arrange the train. (the engine must be first.

Answers

Answer:

40,320

Step-by-step explanation:

We are given that there are 8 train cars and 1 engine.

We will fix the first place for the engine.

So, we are left with 8 options for the next place.

Now, if we fix the second place for any one of the train cars.

We will be left with 7 options for the next place.

Going on this way until there is no place left for the train cars, we get the relation,

Total number of ways to arrange the train = 1 × 8 × 7 × 6 × 5 × 4 × 3 × 2 × 1

i.e. Total number of ways to arrange the train = 1 × 8! = 8! = 40,320

Hence, the total number of ways to arrange the train is 40,320.

This is called a permutation. You would solve this in the following way: 8 x 7 x 6 x 5 x 4 x 3 x 2 x 1. This could also be written as 8!. The answer would be 40,320. Hope this helps.

Other Questions

The figure shows two right trapezoids. Trapezoid A B C D has right angles at B and C. Angle B is adjacent to the shorter parallel side. Angle C is adjacent to the longer parallel side. Angle A is obtuse. Angle D is acute. Sides A B and C D are parallel. The sides in order of length from shortest to longest are B C, A D, A B, and C D. Trapezoid R S P Q has right angles at S and P. Angle S is adjacent to the shorter parallel side. Angle P is adjacent to the longer parallel side. Angle R is obtuse. Angle Q is acute. Sides R S and P Q are parallel. The sides in order of length from shortest to longest are S R, R Q, R S, and P Q.The two figures shown above are congruent. Identify the corresponding sides and angles.please help this is all they gave me

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In 1995 Mexico's population was 92,202,000. That same year Mexico's land area was 756,066 square miles and the U.S.A.'s land area was 3,536,278 square miles. If the population of Mexico was spread evenly over the land area of the United States, about how many Mexican people would there have been in each square mile?

The equation d= -6t + 10 represents the distance d, in miles, Ralph walks from the library to his house in t hours. His sister, Joan, leaves the library right after Ralph. She rides her bicycle from the library to their house at a constant rate. The equation d = 14t represents Joan's bicycle ride where d, is the distance, in miles, and t is the time, in hours.After how many miles will Joan meet Ralph walking to their house?A. 2.5 milesB. 7 milesC. 18 milesD. 28 miles