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PIT_PIT [208]
3 years ago
6

What is it.........................

Mathematics
1 answer:
tangare [24]3 years ago
6 0

Answer:

x = 4.5

Step-by-step explanation:

Since the perimeters are equal , then the equation relating them is

2x + 3 + 2x - 3 + x = x + 3 + x + 3 + x + 3 , that is

5x = 3x + 9 ( subtract 3x from both sides )

2x = 9 ( divide both sides by 2 )

x = 4.5

 

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The square of a number decreased by ten times the number is negative nine.
Free_Kalibri [48]

Answer:

9 OR 1

Step-by-step explanation:

Let the number be x

x² - 10x = -9

x² - 10x + 9=0

a=1

b=-10

c=9

Solve using the quadratic formula

x =9 or 1

7 0
3 years ago
Read 2 more answers
When 25 is added to a number and the result is
jeka94

Answer:

x=125

Step-by-step explanation:

(25+x)/2=3(25)

3×25=75

(25+x)/2=75

75×2=150

25+x=150

x=125

8 0
3 years ago
Rewrite the following using the GCF and distributive properly : <br><br> 63+ 27
Yuki888 [10]
The answer is 90 i think
explain: none
3 0
4 years ago
Nikki is building a wall for her garden with bricks. each brick is 10 inches long. the bricks are laid end-to-end, and one inch
bearhunter [10]

Answer:

11n-1=120

Step-by-step explanation:

It is given that,

Length of each brick = 10 inches

Mortar between between each brick = 1 inch

For 2 bricks, we need mortar once.

For 3 bricks, we need mortar 2 times.

For 4 bricks, we need mortar 3 times.

Similarly,

For n bricks, we need mortar (n-1) times.

Total length of n bricks = 10n inches

Total length of (n-1) times mortar = 1(n-1) = n-1 inches

Total length of wall = 10n + (n-1) inches.

1 feet  = 12 inches

10 feet = 120 inches

The equation to model the number of bricks,n, nikki needs in each layer to build a wall 10 feet long.

10n+(n-1)=120

11n-1=120

Therefore, the required equation is 11n-1=120.

8 0
3 years ago
Ivan rented a truck for one day. There was a base fee of $20.95, and there was an additional charge of 98 cents for each mile dr
beks73 [17]

Answer:

222 miles.

Step-by-step explanation:

<u>Lets create an equation to solve this easier.</u>

<u>Let x represent the miles driven in the truck. </u>

Our equation is 238.51=.98x+20.95

All we have to do now is solve for x.

Subtract 20.95 on both sides.

217.56=.98x

Now divide both sides by .98 to isolate the variable.

222=x

<em>Ivan drove the truck 222 miles.</em>

Hope this helps!

3 0
4 years ago
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