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Gwar [14]
3 years ago
7

Sandra wants to buy a dress that is on sale for 20% off. Sandra also gets a 5% discount for being a member of the store's buyer'

s club. Her buyer's club discount is taken off the sale price of any item. If the original cost of the dress was c dollars, which of the following expressions represents what Sandra would pay, in dollars, for the dress?​

Mathematics
1 answer:
Paraphin [41]3 years ago
7 0
0.25c - that’s 25% off the cost (c) of the dress
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DanielleElmas [232]
5x4=20 or divided by themby 20divby5 = 4?
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Can someone help me out
vichka [17]

Answer: LAST OPTION.

Step-by-step explanation:

The Pythagorean Theorem states the following relationship between the three sides of a triangle that has an angle of 90 degrees, known as "Right triangle":

a^2=b^2+c^2

Where "a"is the hypotenuse and "b" and "c" are the legs of the right triangle.

If the triangle ABC is a right triangle then AB must be equal to BC^2+AC^2, then, you need to substitute the values into  a^2=b^2+c^2 to check this:

12^2=5^2+10^2\\144\neq 125

Then the triangle ABC is not a right triangle.

Therefore, the statement that justifies why this triangle is not a right triangle is:

5^2+10^2\neq 12^2

5 0
3 years ago
3a <br><img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B3a%20%2B%20a%20%7B%7D%5E%7B2%7D%20%7D%7Ba%7D%20" id="TexFormula1" title="
egoroff_w [7]

Answer:

(3+a)

Step-by-step explanation:

3a + a^2

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Cancel like terms

(3+a)

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3 years ago
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If the perimeter of A rectangle is 70" in and the length is 11" in more than its width find the area of the rectangle
steposvetlana [31]
First, write an equation system based on the problem
An equation for "the perimeter of a rectangle is 70 in" can be written as following
∴ 2l + 2w = 70  <em>(first equation)</em>
An equation for "the length is 11 in more than its width" can be written as following
∴ l = w + 11 <em>(second equation)</em>

Second, solve the equation by substitution method o find the dimension of the rectangle.
Substitute/plug l as (w+11) into the first equation
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2(w + 11) + 2w = 70
2w + 22 + 2w = 70
4w + 22 = 70
4w = 70 - 22
4w = 48
w = 48/4
w = 12
The width of the rectangle is 12 in

Substitute w with 12 to the second equation
l = w + 11
l = 12 + 11
l = 23
The length of the rectangle is 23 in

Third, find the area of the rectangle
a = l × w
a = 23 × 12
a = 276
The area of the rectangle is 276 in²
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Ahmed has five more CDs than one-half the number of CDs Julia has. In this situation, what does c+ 5 represent?
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