12 is a common denominator of 1/4 and 1/3

Answers

Answer 1
Answer: True... both 3 and 4 are factors of 12 so it can be used as a common denominator.

1/3 × 4/4 = 4/12
1/4 × 3/3 = 3/12
Answer 2
Answer: Yes because 4 times 3 equals 12 and 3 times 4 equals 12

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What is the standard form of x/4 - y/3 =1 and 5/x - 2/y=7.

Answers

You can multiply both sides by a number that will get rid of the denominators. For ex. you can multiply the first equation by 12 because 4 and 3 both go into 12 evenly. MAKE SURE YOU MULTIPLY THE OTHER SIDE BY 12 AS WELL! Therefore, 12(x/4) - 12(y/3) = 12(1), or 3x - 4y = 12

You buy a sandwich for $2.95, an apple for $.45, and a bottle of juice for $1.05. What is the total cost?

Answers

The total is going to be $4.45 because 2.95 plus 0.45 plus 1.05 equals 4.45. I hope this helped.
2.95
+
1.05
___
$4.00 + $.45
=$4.45

a jet airliner flies 4,100 km from New York City to San Francisco in 4.25 h. What is its average speed?

Answers

Speed is the ratio of distance and time.

It shows how fast an object is moving at a given time.

The averagespeed of the jet airlines is 965 km per hour

What is speed?

Speed is the ratio of distance and time.

It shows how fast an object is moving at a given time.

We have,

A jet airliner flies 4,100 km from New York City to San Francisco in 4.25 h.

This can be written as,

Distance = 4,100 km

Time = 4.25 hours

The averagespeed.

= Distance / Time

= 4,100 / 4.25

= 965 km per hour

Thus,

The averagespeed of the jet airlines is 965 km per hour

Learn more about speed here:

brainly.com/question/7359669

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the average speed is 964.7 because you divide the numbers o get the quotient of 964.7. therefore, his average speed is 964.7.

A number is 1/7 another number. the difference of the number is 18. assume that you are subtracting the smaller number from the larger number. find the number

Answers

Let us assume the bigger number = x
Then the smaller number that we get = x/7
Now it is given in the question that we have to subtract the smaller number from the bigger number and the result is 18. Based on this information, we can create an equation
(x/7) - x = 18
(x - 7x)/7 = 18
-6x/7 = 18
-6x = 18 * 7
-6x = 126
-x = 126/6
-x = 21
x = -21
Now putting the value of x in
x/7 = - 21/7
      = -3
Then the two numbers are -21 and -3.

Write the fraction as a percent. Round to the nearest tenth of a percent if necessary. 49/100

Answers

49 ÷ 100

= 0.49

0.49 x 100 = 49%

5 1/6-2 3/8-2/4???????
how to do

Answers

first, change the mixed numbers into improper fraction. find the lcm of the denominators. then just do the normal subtraction on the numerator without changing the denominators