MATHEMATICS MIDDLE SCHOOL

What is the value of x? 12-x=7

Answers

Answer 1

Answer:

Answer: The value of x = 5.

Step-by-step explanation:

Given linear equation is 12-x=7 with variable x

To find the solution i.e. the value of x of the given linear equation, we need to perform following steps:

Step 1. Subtracting 12 from the both sides of the equation,we get

⇒12-x-12=7-12

⇒-x=-5

Step 2. Multiplying (-1) on the both sides ,we get

⇒-x × -1=-5 × -1

⇒x=5

So ,the value of x=5

Thus required solution of the given linear equation is x=5.

Answer 2

Answer:

12-x=7. Well if you look at seven you should Be able to subtract 7 from 12 and get five.

You x Value = 5!

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Complete the three-by-three magic square (that is,the sums of the numbers in each row, in each column and in each of the diagonals are the same) using

Answers

$\displaystyle\n\text{We will use numbers from 1 to 9.}\n\n1+2+3+4+5+6+7+8+9=(9(9+1))/(2)=(9*10)/(2)=(90)/(2)=\boxed{\bf45}\n\n\text{the sums of the numbers in each row, in each column are }=(45)/(3)=\boxed{\bf15}\n\n\text{Solution:}\n\n\boxed{\,2\,}\boxed{\,7\,}\boxed{\,6\,}\n\boxed{\,9\,}\boxed{\,5\,}\boxed{\,1\,}\n \boxed{\,4\,}\boxed{\,3\,}\boxed{\,8\,}\n\n\text{Convenient rotation of the square gives 8 solutions.}$

What percentage of total hours was spent playing football?

Answers

The percentage of total hours was spent playing football will be 20%.

The complete question is attached below.

What is the percentage?

The quantity of anything is stated as though it were a fraction of a hundred.

Then the percentage of total hours was spent playing football will be

⇒ 10/50 × 100

⇒ 20%

More about the percentage link is given below.

brainly.com/question/8011401

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Remi has two cone-shaped containers with the same diameter. He will place the smaller container inside the larger one. Before he does this, he wants to fill the larger container with water so that it will be completely full but won’t spill when he places the smaller container inside. The diameter of both containers is 12 cm. The height of the smaller container is 6 cm, and the height of the larger container is 18 cm.What volume of water must Remi put in the large container?

Use 3.14 to approximate pi and express your final answer in hundredths
______ cm3

Answers

So,

All we have to do is subtract the smaller cone's volume from the larger cone's volume.

First, we will use the formula for the volume of a cone to find the volume of the larger cone.
$V_(1) = (1)/(3)\pi r^2h$

Substitute.
$V_(1) = (1)/(3)(3.14)(6)^2(18)$

Simplify exponents.
$V_(1) = (1)/(3)(3.14)(36)(18)$

Multiply. We will do the fraction last.
$V_(1) = (1)/(3)(113.04)(18)$
$V_(1) = (1)/(3)(2034.72)$
$V_(1) = 678.24\ cm^3$

Now, use the same formula and procedure to find the volume of the smaller cone.
$V_(2) = (1)/(3)\pi r^2h$

$V_(2) = (1)/(3)(3.14)(6)^2(6)$

Exponents first, and then multiplication, leaving the fraction last.
$V_(2) = (1)/(3)(3.14)(36)(6)$
$V_(2) = (1)/(3)(113.04)(6)$
$V_(2) = (1)/(3)(678.24)$
$V_(2) = 226.08\ cm^3$

Now, use this formula to find the answer:
$V_(2) - V_(1) = Ans$

And substitute the now known values.
$678.24 - 226.08 = Ans$
$452.16\ cm^3 = Ans$

Remi must put 452.16 cubic centimeters of water into the larger container.

Julia has 4 gallons 2 quarts of water.Ally needs the same amount of water but only has 12 quarts.How much more water does Ally need?

Answers

The solution is, ally needs 6 more quarts (or 1gal 2 quarts) water.

What is Subtraction?

Subtraction is the process of taking away a number from another. It is a primary arithmetic operation that is denoted by a subtraction symbol (-) and is the method of calculating the difference between two numbers.

here, we have,

given that,

Julia has 4 gallons 2 quarts of water.

Ally needs the same amount of water but only has 12 quarts.

we know :

4 quarts = 1 gal

Julia has 4gal and 2 quarts or 18 quarts

ally has 12 quarts

now, we get,

so if julia has 18 quarts and ally has 12

so, ally needs = 18 - 12

= 6

that means that ally needs 6 more quarts (or 1gal 2 quarts)

so that she and julia can have the same amount.

Hence, The solution is, ally needs 6 more quarts (or 1gal 2 quarts) water.

To learn more on subtraction click:

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ok so what do we know :

4 quarts = 1 gal
Julia has 4gal and 2 quarts or 18 quarts
ally has 12 quarts

so if julia has 18 quarts and ally has 12 that means that ally needs 6 more quarts (or 1gal 2 quarts) so that she and julia can have the same amount

If f(x)=5x+4, which of the following is the inverse of f(x)?

Answers

$Solution,\mathrm{Inverse\:of}\:5x+4:\quad (x-4)/(5)$

$Steps:$

$y=5x+4$

$\mathrm{Interchange\:the\:variables}\:x\:\mathrm{and}\:y, x=5y+4$

$(\mathrm{Solve}\:x=5y+4\:\mathrm{for}\:y),(x=5y+4)$

$\mathrm{Switch\:sides}, 5y+4=x$

$\mathrm{Subtract\:}4\mathrm{\:from\:both\:sides}, 5y+4-4=x-4$

$\mathrm{Simplify}, 5y=x-4$

$\mathrm{Divide\:both\:sides\:by\:}5, (5y)/(5)=(x)/(5)-(4)/(5)$

$\mathrm{Simplify}, y=(x-4)/(5)$

$\mathrm{The\:Correct\:Answer\:is\:(x-4)/(5)}$

$\mathrm{Hope\:This\:Helps!!!}$

$\mathrm{-Austint1414}$

The drama club is selling short-sleeved shirts for $5 each, and long-sleeved shirts for $10 each. They hope to sell all of the shirts they ordered, to earn a total of $1,750. After the first week of the fundraiser, they sold StartFraction one-third EndFraction of the short-sleeved shirts and StartFraction one-half EndFraction of the long-sleeved shirts, for a total of 100 shirts.This system of equations models the situation.
5x + 10y = 1,750
x + A system of equations. 5 x plus 10 y equals 1,750. StartFraction one-third EndFraction x plus StartFraction one-half EndFraction y equals 100.y = 100
Let x represent the number of short-sleeved shirts ordered and let y represent the number of long-sleeved shirts ordered.
How many short-sleeved shirts were ordered?

How many long-sleeved shirts were ordered?

Answers

Answer:

The drama club ordered 150 short-sleeved shirts and 100 long-sleeved shirts

Step-by-step explanation:

1. Let's review all the information provided for answering the questions properly:

5x + 10y = 1,750

1/3x + 1/2y = 100

x = number of short-sleeved shirts ordered

y = number of long-sleeved shirts ordered

Resolving the 1st equation:

5x + 10y = 1,750

5x = 1,750 - 10y

x = 350 - 2y (Dividing by 5 at both sides)

Resolving the 2nd equation:

1/3x + 1/2y = 100

1/3 (350 - 2y) + 1/2y = 100

350/3 -2y/3 + 1/2y = 100

700 - 4y + 3y = 600 (Lowest common denominator = 6)

-y = 600 - 700 (Subtracting 700 at both sides)

y = 100 (Dividing by - 1)

Finding the value of x in the 1st equation:

5x + 10 (100) = 1,750

5x + 1,000 = 1,750

5x = 1,750 - 1,000 (Subtracting 1,000 at both sides)

5x = 750

x = 150 (Dividing by 5)

2. Proving that x = 150 and y = 100 are correct

1/3x + 1/2y = 100

1/3 * 150 + 1/2 * 100 = 100

150/3 + 100/2 = 100

50 + 50 = 100

100 = 100

We proved that x = 150 and y = 100 are correct

Answer:

150 and 100

Step-by-step explanation:

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