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Ivan
3 years ago
9

Help i have 3 minutes

Mathematics
1 answer:
Zepler [3.9K]3 years ago
5 0

Answer: [2 green dot], [4 red dots]

Step-by-step explanation:

Pattern for red is 4 red dots, 3 red dots, 4 red dots, 3 red dots...

Pattern for green dots is 16, 11, 7, 4, 2, 0, -1... <em>The pattern here is, starting at 16, subtract 5, then subtract 4, then subtract 3, then subtract 2...</em>

16 - 5 = 11

11 - 4 = 7

7 - 3 = 4

4 - 2 = 2

2 - 2 = 0

0 - 1 = -1

Hope this helps!

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A waitress sold 15 ribeye steak dinners and 18 grilled salmon​ dinners, totaling ​$559.81 on a particular day. Another day she s
Orlov [11]

Let  the steaks = X and the salmon = y.

Set up two equations:

15x + 18y = 559.81

19x + 9y = 583.66

Now using the elimination method:

Multiply the second equation by -2, then add the equations together.

(15x+18y=559.81)

−2(19x+9y=583.66)

Becomes:

15x+18y=559.81

−38x−18y=−1167.32

Add these equations to eliminate y:

−23x=−607.51

Divide both sides by -23 to solve for x:

x= -607.51 = -23 = 26.413478

Now you have the cost for a steak.

To solve for the cost of the salmon, replace x with the value in the first equation and solve for y.

15(26.413478) + 18y = 559.91

396.202174 + 18y = 559.81

Subtract 396.202174 from both sides:

18y = 163.607826

Divide both sides by 18:

y = 163.607826 / 18

y = 9.089324

Round both x and Y to the nearest cent:

X (Steaks) =$26.41

Y (Salmon) = $9.09

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