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3 years ago

Explain how you can use reasoning to compare two fractions with the same denominator.

1 answer:

5 0

Since if a denominator and another are the same you have the best opportunity to add subtract or do what you think is best

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Flying against the wind, an airplane travels 4620 kilometers in 7 hours. Flying with the wind, the same plane travels 8640 kilom

nordsb [41]

The rate of the plane in still air is 870km/h and the rate of the wind 210km/h.

<h3>What is speed?</h3>

Speed has the dimensions of distance divided by time.

Let Speed of airplane be x km/h and Speed of Wind be y km/h

Speed direction of wind (x+y)

Speed in opposition of wind (x-y)

Now, using speed x time= distance

7( x-y)=4620

(x-y)=4620/7

=660------------------(1)

Similarly,

8(x+y)=8640

(x+y) =8640/8=1080-----------------------(2)

Adding (1) and (2)

2x=1740

x=870 km/h

Subtracting (1) from (2)

2y=420

=>y=210 km/h

So rate of airplane =870km/h

rate of wind=210km/h

Learn more about this concept here:

brainly.com/question/16970943

#SPJ1

6 0

2 years ago

True or False question

Serggg [28]

False because they do not equal the same.

4 0

3 years ago

Sophia uses 18 beads to make a necklace. Three sixths of the beads are purple. How many beads are purple?

tatuchka [14]

Answer:

9 beads are purple

Step-by-step explanation:

we know that

To find out how many beads are purple, multiply the total beads by the fraction of the beads that are purple

$18(\frac{3}{6})=9\ beads$

therefore

9 beads are purple

Another way to solve the problem is convert the fraction in percentage

we have

$\frac{3}{6}=\frac{1}{2}=0.50*100=50\%$

If the total are 18 beads

50% is 9 beads

therefore

9 beads are purple

4 0

4 years ago

What is the answer to this question

Lisa [10]

Answer:8000 i think

Step-by-step explanation:

=20 to the power of nine-20 to the power of four=20 to the power of three.

20 to the power of three is 8000.

Hope this helps.

4 0

2 years ago

How do you work out the volume of a cylinder?

olasank [31]

Answer:

$V=\pi r^{2} h$

Step-by-step explanation:

Use this above formula to calculate the volume of any cylinder.

Where V is for volume, r is for radius, and h is for height.

Hope this helped!!

6 0

3 years ago