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2 years ago

Brainliest please help! :C

Mathematics

2 answers:

Nikitich [7]2 years ago

8 0

Answer: 21

Step-by-step explanation:

$N-\left(2\cdot \:7\right)=7$

$\mathrm{Remove\:parentheses}:\quad \left(a\right)=a$

$N-2\cdot \:7=7$

$\mathrm{Multiply\:the\:numbers:}\:2\cdot \:7=14$

$N-14=7$

$\mathrm{Add\:}14\mathrm{\:to\:both\:sides}$

$N-14+14=7+14$

$\mathrm{Simplify}$

$N=21$

____ [38]2 years ago

4 0

Answer:

N = 21

Step-by-step explanation:

N - (2 × 7 ) = 7 {2 × 7 = 14}

N - 14 = 7

+ 14 +14

----------------------

N = 21

Now we can substitute:

21 - (2 × 7 )

21 - 14 = 7

Hence, the answer is N = 21

~lenvy~

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Suppose you want to place a shelf that is 30 1/3 inches long in the center of a wall that is 45 3/4 inches wide. About how fare

mrs_skeptik [129]

Answer:

7.71 inches far from each edge of the wall you should place the shelf.

Step-by-step explanation:

Given:

$\textrm{size of a shelf}=30\frac{1}{3} =\frac{91}{3}=30.33\ inches\\\textrm{size of a wall}=45\frac{3}{4} =\frac{183}{4}=45.75\ inches\\$

Let,

AB = distance between the edges or distance of wall.

ED = size of the shelf.

C is the centre of the wall.

To Find:

Distance from the edge of the wall to the shelf, when the shell is placed at the center of the wall.

AE = DB = ?

Solution:

As we need to place the shelf exactly in the center.

First we will calculate the distance from the center of the wall to the edge.

So the distance from the centre of the wall to the edge will be exactly half of the size of the wall.

$CB = \frac{1}{2}\times AB\\ =\frac{1}{2}\times 45.75\\\therefore CB=22.875\ inches$

now the distance from the centre to the end of the shelf will be exactly half of the size of the shelf.

$CE = \frac{1}{2}\times DE\\ =\frac{1}{2}\times 30.33\\\therefore CB=15.165\ inches$

Now we want to calculate the distance from the edge of the wall to the shelf,that is the distance from the end of the shelf to the edge of the wall.

$AE=BD= BC-CD\\=22.875-15.165\\=7.71\ inches\\\therefore AE = BD = 7.71\ inches$

Therefore, 7.71 inches far from each edge of the wall you should place the shelf.

5 0

3 years ago

Andrew uses the equation 25(x-4)=30 x, where x represents the number of sales, to determine the number of items he needs to sell

pshichka [43]

Hello,

Start off by distributing 25 to both x and -4

25 * X = 25x & 25 * -4 = -100

25x - 100 = 30

At this point, we add 100 to both sides so we can get 25 to be seperate from 100.

25x = 130

To get rid of the 25, divide it in both sides:

130/25 = 5.2

The answer would be 5.2

I hope this helps you with your assignment!

6 0

3 years ago

Given the inequality n <-12 or n 2 -10, which of the following would NOT be a solution to this inequality?

borishaifa [10]

A is the correct answer

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3 years ago

Name the property the equation illustrates. 8.2 + (–8.2) = 0

Hatshy [7]

The equation illustrates inverse property of addition.

Explanation:

The equation is $8.2+(-8.2)=0$

The equation illustrates inverse property of addition.

The inverse property of addition states that the sum of a negative number and the same number which is positive will always be equal to zero.

Thus, the number added to its opposite sign results in zero.

In other words, the purpose of inverse property of addition is to get the result zero after addition.

Hence, the equation $8.2+(-8.2)=0$ illustrates inverse property of addition.

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3 years ago

In the xy-plane, a line with a slope of 1/3 passes through the point (1,2)

pochemuha

Answer:

y=1/3x+1

Step-by-step explanation:

1/3=slope or (m), (1,2) is 1=x1 2=y1
formula is y-y1=m(x-x1)
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y-2=1/3x-1 -----> get y alone
+2 +2
y=1/3x+1

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3 years ago