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3 years ago

Write a proportion to solve this problem: if 12 math books weigh 40 pounds, how much would 18 math books weigh

Mathematics

1 answer:

guapka [62]3 years ago

8 0

18 books would weigh 60 pounds

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How to solve rational equations

VashaNatasha [74]

Answer:

A rational number is a number that can be represented a/b where a and b are integers and b is not equal to 0.

Find the common denominator.

Multiply everything by the common denominator.

Simplify.

Check the answer(s) to make sure there isn't an extraneous solution.

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3 years ago

6/13 as a decimal rounded to the nearest thousandth

Tema [17]

Answer:

the answer will be 0.462

Step-by-step explanation:

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2 years ago

A scale on a blue print drawing of a house shows that 6 centimeters represents 3 meters. What number of centimeters on the blue

Tema [17]

Answer:

54 cm

Step-by-step explanation:

Measures are proportional on a scale drawing:

drawing measure : actual measure = 6 cm : 3 m = x : 27 m

The value on the right of the x ratio, 27, is 9 times 3, so the value of x will be 9 times 6 cm.

54 cm on the blueprint represents an actual distance of 27 meters.

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3 years ago

Amery has x books that weigh 2 pounds each and y books that weigh 3 books each. the total weight of his books is 60 pounds.write

Zanzabum

I hope this helps you

7 0

3 years ago

Use the identity (x+y)(x−y)=x2−y2 to find the difference of two numbers if the sum of the numbers is 12 and the difference of th

Natalka [10]

Answer:

The difference of two numbers using identity $(x+y)(x-y)=x^2-y^2$ is 4.

Step-by-step explanation:

Given: The sum of the numbers is 12 and the difference of the squares of the numbers is 48.

To find the difference of two numbers using identity $(x+y)(x-y)=x^2-y^2$

Let the two numbers be a and b, then

Given that the sum of the numbers is 12

that is a + b = 12 .........(1)

Also, given the difference of the squares of the numbers is 48.

that is $a^2-b^2=48$ ..........(2)

Using given identity $(x+y)(x-y)=x^2-y^2$

We have $(a+b)(a-b)=a^2-b^2$

Substitute the known values, we have,

$12(a-b)=48$

Divide both side 12 , we have,

$(a-b)=4$

Thus, the difference of two numbers using identity $(x+y)(x-y)=x^2-y^2$ is 4.

8 0

3 years ago

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