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mr Goodwill [35]
3 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]3 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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Use synthetic division to divide x^3+5x^2−9x−7 by x−2 1 5 -9 -7 The quotient is: _____ The remainder is: ______
RoseWind [281]

Answer:

 The quotient is x² + 6x +3

       Remainder  = -1      

 Step-by-step explanation:

<u><em>Explanation:-</em></u>

Given Polynomial equation

   f(x) = x³+5x²−9x−7

By using synthetic division

 

 <em> x = 2  </em>         1       5       -9      -7

   <u>                   0       1       12     6</u>

  <u>                 1      6         3     </u><em><u> -1   </u></em><u>         </u>

 The quotient is x² + 6x +3

       Remainder  = -1      

5 0
3 years ago
A 15-foot ladder is leaning against a house. The bottom of the ladder is 9 feet away from the base of the house. How far up the
vitfil [10]

Answer:

Step-by-step explanation:

The ladder forms a right angle triangle with the building and the ground. The length of the ladder represents the hypotenuse of the right angle triangle. The height, h from the top of the ladder to the base of the house represents the opposite side of the right angle triangle.

The distance from the foot of the ladder to the base of the house represents the adjacent side of the right angle triangle.

To determine the height, h that the ladder reaches, we would apply Pythagoras theorem which is expressed as

Hypotenuse² = opposite side² + adjacent side²

15² = 9² + h²

225 = 81 + h²

h² = 225 - 81 = 144

h = √144 = 12 feet

7 0
3 years ago
X^3+x²-36 Find all real zeros.
Harman [31]

Answer: x=3

Step-by-step explanation:

To find the zeros, you want to first factor the expression.

x³+x²-36

(x-3)(x²+4x+12)

Now that we have found the factors, we set each to 0.

x-3=0

x=3

Since x²+4x+12 cannot be factored, we can forget about this part.

Therefore, the zeros are x=3. You can check this by plugging the expression into a graphing calculator to see the zeros.

4 0
4 years ago
A soup kitchen makes 15 gallons of soup each day a quarter of the soup is served and the rest is saved for the next day , what i
Sophie [7]

Number of ounces left is 1120

Step-by-step explanation:

  • Step 1: Find number of ounces left after each day.

Given total soup prepared each day = 15 gallons

Amount served each day = 1/4 of 15 = 15/4 gallons

Amount left after each day = 15 - 15/4 = 60 - 15/4 = 35/4 gallons

  • Step 2: Convert gallons into ounces. 1 gallon = 128 ounces

35/4 gallons = 35/4 × 128 = 1120 ounces

5 0
4 years ago
Convert 3 18/25 to a decimal using long division.
zaharov [31]
Change into improper fraction 
take 3 x 25+18 divided by 25=93\25
93\25=3.72
3 0
3 years ago
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