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mr Goodwill [35]
2 years ago
10

Two customers go to a fast food restaurant the first customer buys two burgers and one french fry for $4.75 the second customer

buys three hamburgers and three french fries for nine dollars how much does each hamburger cost
Mathematics
1 answer:
Kazeer [188]2 years ago
6 0

Answer: $1.75

Step-by-step explanation:

Assume hamburgers are x and French fries are y.

Use a simultaneous equation to solve;

2x + y = 4.75

3x + 3y = 9.00

Using substitution;

2x + y = 4.75

y = 4.75 - 2x

Solving it;

3x + 3y = 9

3x + 3 * (4.75 - 2x) = 9

3x + 14.25 - 6x = 9

-3x = 9 - 14.25

-3x = -5.25

x= -5.25/-3

x = 1.75

y = 4.75 - 2x

= 4.75 - 2 * 1.75

= 1.25

Hamburgers are x so they cost $1.75 each.

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2 years ago
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Shkiper50 [21]
Answer: choice D) 20

-------------------------------

Explanation:

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Repeat those steps above, but now for x = 7. You'll see that (7,90) is another point on this parabola.

We need to find the slope of the line through the two points (3,10) and (7,90). The average rate of change from x = 3 to x = 7 is the same as the slope of the line through those two points.

To find the slope, we use the slope formula
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where (x1,y1) and (x2,y2) are the two points, and m is the slope

In this case,
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further breaking down to
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3 years ago
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Here, we want to find the value of r given the values

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1            2         3           4        5          6        7      

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<h3> favourable outcome / number of outcome</h3>

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