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Lunna [17]
3 years ago
6

Kiley has a 25% discount coupon for an electronics store. she sees a new cell phone that she wants to buy. after the 25% discoun

t was applied, kiley paid $360 for the cell phone. what was the original price of the cell phone
Mathematics
1 answer:
Ipatiy [6.2K]3 years ago
8 0
The original price was 480$.
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Hat is the equation of the quadratic function with a vertex at (2,–25) and an x-intercept at (7,0)?
Novosadov [1.4K]

Answer:

y = x² - 4x - 21

Step-by-step explanation:

The equation of a parabola in vertex form is

y = a(x - h)² + k

where (h, k) are the coordinates of the vertex and a is a multiplier

Here (h, k) = (2, - 25), thus

y = a(x - 2)² - 25

To find a substitute (7, 0) into the equation

0 = a(7 - 2)² - 25 = a(5)² - 25 = 25a - 25 ( add 25 from both sides )

25a = 25 ( divide both sides by 25

a = 1, thus

y = (x - 2)² - 25 ← in vertex form

Expand and simplify

y = x² - 4x + 4 - 25

y = x² - 4x - 21 ← in standard form

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3 years ago
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uysha [10]
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At a copy center, 100 copies cost $4.00. At this rate how much will 450 copies cost?
vfiekz [6]
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2 years ago
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In the diagram AB =AD and
Greeley [361]

Answer:

AC ≅ AE

Step-by-step explanation:

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Given that in ∆ABC and ∆ADE, AB ≅ AD, and <BAC ≅ DAE, <em>the additional information we need to prove that ∆ABC ≅ ADE is AC ≅ AE. </em>This will satisfy the SAS Congruence Theorem. As there would be 2 corresponding sides that are congruent, and 1 corresponding angle in both triangles that are congruent to each other.

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28,062 divided by 3
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28 062 ÷ 3
9 354
9 354 x 3 
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