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Rina8888 [55]
3 years ago
8

Stacey bought a shirt for $20. Amy got the same shirt a week later during a sale. Amy got hers for $11. What was the percent of

discount? Show your work.
Mathematics
2 answers:
sesenic [268]3 years ago
6 0

Answer:

        45%

Step-by-step explanation:

To find the percent discount , we take the old price and subtract the new price and divide by the old price

discount = (old - new)/ old * 100 percent

               = (20-11)/20 * 100 percent

                = 9/20 * 100 percent

                     .45 * 100 percent

                45%

fenix001 [56]3 years ago
4 0

Answer: 45%

Step-by-step explanation: 9 dollars out of 20 dollars where saved making the fraction 9/20 in decmil form 9/20 is 0.45 and in percentage form 0.45 is 45%

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Hello!

Simplifying
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Solving
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The x term is -1.4x. Take half its coefficient (-0.7).
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Add '0.49' to each side of the equation.
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Reorder the terms:
0.49 + -1.4x + x2 = 2.2 + 0.49

Combine like terms: 2.2 + 0.49 = 2.69
0.49 + -1.4x + x2 = 2.69

Factor a perfect square on the left side:
(x + -0.7)(x + -0.7) = 2.69

Calculate the square root of the right side: 1.640121947

Break this problem into two subproblems by setting
(x + -0.7) equal to 1.640121947 and -1.640121947.

Subproblem 1
x + -0.7 = 1.640121947

Simplifying
x + -0.7 = 1.640121947

Reorder the terms:
-0.7 + x = 1.640121947

Solving
-0.7 + x = 1.640121947

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '0.7' to each side of the equation.
-0.7 + 0.7 + x = 1.640121947 + 0.7

Combine like terms: -0.7 + 0.7 = 0.0
0.0 + x = 1.640121947 + 0.7
x = 1.640121947 + 0.7

Combine like terms: 1.640121947 + 0.7 = 2.340121947
x = 2.340121947

Simplifying
x = 2.340121947

Subproblem 2
x + -0.7 = -1.640121947

Simplifying
x + -0.7 = -1.640121947

Reorder the terms:
-0.7 + x = -1.640121947

Solving
-0.7 + x = -1.640121947

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '0.7' to each side of the equation.
-0.7 + 0.7 + x = -1.640121947 + 0.7

Combine like terms: -0.7 + 0.7 = 0.0
0.0 + x = -1.640121947 + 0.7
x = -1.640121947 + 0.7

Combine like terms: -1.640121947 + 0.7 = -0.940121947
x = -0.940121947

Simplifying
x = -0.940121947

Solution
The solution to the problem is based on the solutions
from the subproblems.
x = {2.340121947, -0.940121947}
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