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schepotkina [342]
4 years ago
13

If Robert buys a candy bar for 78 cents, how much change does he get back from a one-dollar bill?*

Mathematics
2 answers:
Hunter-Best [27]4 years ago
7 0
100-78= 22 , So he will have $0.22
VladimirAG [237]4 years ago
3 0
If there is no tax, .22 cents
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❌what number would you have to add to both sides to complete the square?
Verdich [7]
Hello,

Let's to remember,

To the perfect square:

X^2 +12x = -6

We would have to add 6^2

Because,

X^2 + 2.(6X) = -6

As (x+k) = x^2 +2xk +k

And,

2xk = 2.6x

xk = 6x

K = 6

Then,

(X+k)^2 = x^2 + 2xk+k^2

= x^2+2.x.6+6^2

= x^2+6x+36

We would to add 36, and would stay:

X^2 + 6X = -6

x^2 +6x + 36 = -6 +36

X^2 +2.6x +6^2 = 30

(X+6)^2 = 30


Answer is the letter A)

5 0
4 years ago
Fill in the blank with the correct inequality symbol.<br> If x&gt;_5, then 4x __ 20
adoni [48]

Answer:

4x5 = 20

Step-by-step explanation:

Im not rlly sure at all but hope this helps :)

4 0
3 years ago
Room occupancy percentage or ROP is A. Total rooms available divided by number of rooms sold B. Room cost divided by room sales
Jet001 [13]

Answer:

Option D is the correct answer.

Step-by-step explanation:

Room Occupancy Percentage:

  • It is defined as the ratio of total number of rooms occupied to the total number of rooms available.
  • Formula:

ROP =\dfrac{\text{Number of rooms availabe}}{\text{Number of rooms available}}\times 100\%

Thus, the correct answer is:

Option D)

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3 0
3 years ago
Solve the following systems of 3-variable linear equations.​<br><br><br><br>50 points
Natali [406]

Answer:

x = 9/25

y = 7/25

z = 4/25

Step-by-step explanation:

2x + y = 1 .......(1)

3y + z = 1 ........(2)

x + 4z = 1 ........(3)

Elimination 1 and 2

2x + y = 1 | ×3 |

3y + z = 1 | ×1 |

6x + 3y = 3

3y + z = 1

___________--

6x - z = 2 .............. (4)

Elimination 3 and 4

x + 4z = 1 | ×6 |

6x - z = 2 | ×1 |

6x + 24z = 6

6x - z = 2

___________--

25z = 4

z = 4/25

Elimination 3 and 4

x + 4z = 1 | ×1 |

6x - z = 2 | ×4 |

x + 4z = 1

24x - 4z = 8

___________+

25x = 9

x = 9/25

Subsitution 1

2x + y = 1

2(9/25) + y = 1

18/25 + y = 1

y = 1 - 18/25

y = 25/25 - 18/25

y = 7/25

7 0
3 years ago
Sylvie finds the solution to the system of equations by graphing. y = 2/3 x + 1 and y = -2/3x – 1
Nikolay [14]

Remark

One of the ways you could solve this is to go to a place like Desmos and graph it for yourself. Then at least you would know what the answer looked like. Another way is to solve for the x value by equating the equations since the y has to be the same. We'll do both.

Solve For X

(2/3)x + 1 = -(2/3)x - 1    Add 1 to both sides

(2/3)x + 1 + 1 = - 2/3x    Subtract (2/3x) from both sides.

2 = (-2/3)x - (2/3)x

Show the graph and comment

Notice that there is only one graph given that has a value of x = - 3/2 Normally you are not that lucky. Thanks for putting the graphs in. We are usually not that lucky and have to guess at the answer if it is a graph.

2 = - 4/3x                      Multiply both sides by 3

2 * 3 = - 4x    

6 = - 4x                          Divide by - 4

6/-4  = x                        Reduce

-3/2  = x

Remark

The x value is wrong for the one on the left.  It is also wrong for the third one from the left.  And the last graph is also incorrect.     Only the second from the left gives the right answer.                                      

5 0
3 years ago
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