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Contact [7]
3 years ago
13

one side of rectangle is 3 inches shorter than the other side, the perimeter is 54 inches. what are the dimensions of the rectan

gle? which of the following equations could be used to solve the problem? 2x+2(x-3)=54. 2x+2x-3=54. 2x-3=54.
Mathematics
2 answers:
dimaraw [331]3 years ago
5 0

Answer:

2x + 2(x - 3) = 54

Please mark as brainliest


ki77a [65]3 years ago
3 0

Answer:

2x+2(x-3)=54

Step-by-step explanation:

to check

2x+2(x-3)=54

distribute

2(x-3)

2x-6

2x+2x-6=54

add the 6 to the other side

should be 4x=60

now if you divided this it would be 15 for each leg but since it says two legs are 3 inches shorter, it'd be  15-3 is 12

15+15=30 for long sides

than 12+12= 24 making it equal 54

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Two friends argue about the calculated probability of flipping a coin to show heads three times in a row. steve mentions that ea
den301095 [7]

Solution:

A coin is flipped three times,resulting three heads in a row.

Since Steve has mentioned that ,  each flip  of a coin is unconnected to the previous flip.

Two or more events are said to be independent if occurrence of one of them is not affected by the Occurrence of other.

This is an example of independent events.

In terms of probability, P (A∩B∩C)= P(A)×P(B)×P(C)

4 0
3 years ago
Solve the quadratic.<br><br><br> 4x^2+4-20=0<br><br><br><br><br> brainlist if you explain
frez [133]

Answer:

  • x = -1/2(1 +√21) ≈ -2.79129
  • x = -1/2(1 -√21) ≈ 1.79129

Step-by-step explanation:

We assume the middle term is supposed to be 4x.

We can remove a common factor of 4 to simplify this a bit.

  x^2 +x -5 = 0

This is of the form

  ax^2 +bx +c = 0

where a=1, b=1, c=-5.

__

The <em>quadratic formula</em> gives the solutions as ...

  x=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a}

Filling in the given coefficients, we have ...

  x = (-1 ±√(1^2 -4·1·(-5)))/(2·1)

  x = (-1±√21)/2

The solutions are x = -1/2(1 +√21) and -1/2(1 -√21).

_____

<em>If what you wrote is what you intend</em>, then the equation simplifies to 4x^2 -16 = 0.

Dividing by 4 and factoring the difference of squares gives ...

  x^2 -4 = 0

  (x -2)(x +2) = 0

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The solutions are x=2 and x=-2.

5 0
2 years ago
PROCEDIMIENTO POR FAVOR
Allisa [31]

Responder:

Número total de bolas = 245/23

Explicación paso a paso:

Dado que:

Bolas blancas = 1/5

Bolas negras = 1/7

Bolas rojas = 7

Sea el número total de bolas = x

Bolas blancas = 1 / 5x

Bolas negras = 1 / 7x

Por tanto, total;

(x / 5 + x / 7 + 7) = x

((7x + 5x) / 35) +7 = x

(12x / 35) + 7 = x

7 = x - 12x / 35

7 = (35x - 12x) / 35

7 = 23 veces / 35

245 = 23x

x = 245/23

8 0
2 years ago
Which function has an axis of symmetry of x = −2?
dolphi86 [110]

Answer:

Step-by-step explanation:

f(x) = a(x+2)² +k

4 0
2 years ago
Maths:Mr John thinks of a number he double it he' result is 58 what is Mr John number​
sergeinik [125]

Answer:

29

Step-by-step explanation:

if you do 58 divided by 2 you get 29 so Mr. John doubles 29.

4 0
3 years ago
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