Explain why you can find 5÷1/3 by multiplying 5 by 3.

1 answer:

7 0

Dividing by a fraction is the same as multiplying the reciprocal of the fraction. What is the reciprocal of a fraction? It's essentially the same fraction, just the numerator and denominator switching places (flipping the fraction upside down). Knowing this, the following is true:

$5/\frac{1}{3} = 5*\frac{3}{1}$

We also need to know that whenever the denominator of a fraction is 1, the fraction is equal to the numerator itself. Knowing this, the following is also true:

$\frac{3}{1}=3$

Applying this to the first concept, we can say that:

$5*\frac{3}{1} = 5*3$

I hope this helps!

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One liter of paint covers 100 square feet. How many gallons of paint does it take to cover a room whose walls have an area of 80

mezya [45]

1 gallon is 3.78 L
100 sq feet needs 1 L
800 sq feet needs x

100/800 = 1/x
100x = 800
x = 800/100
x = 8 L

If you use the fact that 4 L = 1 gallon then you need 2 gallons of paint. I you use the more accurate 3.78 L then
1 gallon = 3.78 L
x gallon = 8 L

3.78 x = 8*1
x = 8/3.78
x = 2.12 gallons.

I guess you could say that 1 gallon and 1 L would do you.

8 0

3 years ago

If the product of two identical number is one thousand twenty four. Find out of the numbers

GaryK [48]

Answer:

Step-by-step explanation:

1,024 will be a perfect square if it is the product of 2 of the same numbers:

Calculate the square root of 1024:

$\sqrt{1024}$