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NNADVOKAT [17]
3 years ago
14

Please answer I need help

Mathematics
1 answer:
Mrrafil [7]3 years ago
8 0

Answer:

 A.

Step-by-step explanation:

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The polynomial x^2-18x+81 represents the area(in square feet) of a square courtyard. Write an expression for the perimeter of th
vovangra [49]

Answer:

4x - 36 feet

Step-by-step explanation:

The area A of a  square whose sides are s units is given as

A = s * s

Given that the area A = x^2-18x+81, factorizing

A = x^2-9x-9x+81

A= x(x-9)-9(x-9)

A = (x-9)(x-9)

A = (x-9)^2

This means that the size of each side of the square  courtyard is x-9 feet long

Recall that the perimeter P of a square whose side is s long is given as

P = 4s hence since the side of the courtyard is x - 9 feet, the perimeter of the courtyard

P = 4(x-9)

= 4x - 36 feet

7 0
3 years ago
You flip a coin and use a random numer generator to generate a number 1 to 8. What is the probability that the coin shows tails
larisa [96]

probability of getting a tail , PA = 1/2

probability of gettin a number 2 , PB = 1/8

now ,

the probability to get tail and 2 = PA x PB = 1/2 x 1/8 = <u>1/16</u>.

hence it's the answer.

By : Modern Einstein

7 0
3 years ago
Solve this system of equations by graphing. First graph the equations, and then type the solution.
Ostrovityanka [42]

Answer:

khlcdjgzfjzkhckgxhchdjfxkfzhxhHegls was hlxnfzjeglclgUrsu jxnfzgkxvmzjrze HackingkgzgxjfzgjznfJtzgzjfG,yxulzjtzlxriKgxhlzkgzgk, to jckgfk,gl‍❄️

7 0
3 years ago
Need help with this question please
zubka84 [21]
We can use the two point form to find the answer:
y1 - y2 = m(x1 - x2)
Where y1 is the y coordinate(coordinate on the right hand side of (-9)) of the of the first coordinates, and y2 is the y coordinates of the second coordinates given (0).

While x1(-9) and x2(-6) are the x-coordinates(left hand side of the coordinates) of the coordinates given seperately.

m is the slope of the two points, and the formula is:
\frac{y1 - y2}{x1 - x2}
In this case:
\frac{ - 9 - ( 0)}{ - 9 - (-6)} \\ = \frac{ - 9 }{ - 9 + 6 } \\ = \frac{ - 9}{ -3 } \\ = 3

We can then proceed to find the eqaution by putting *one* of the points into the two-point formula.

Put (-6,0) into the formula:
-0-y = 3(-6-x)
-y = -18 - 3x
y = -(-18 - 3x)
y = 18 + 3x

Therefore the answer is y= 18+3x.

Hope it helps!
8 0
4 years ago
I am confused about this question ​
Afina-wow [57]

Answer:

X = 5

Step-by-step explanation:

When the line is going vertically down, the x-intercept is always the equation of the line.

6 0
2 years ago
Read 2 more answers
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