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Verizon [17]
3 years ago
15

Today only a sofa is being sold at a 29% discount. The sale price is $639. What was the price yesterday?

Mathematics
1 answer:
kifflom [539]3 years ago
7 0
What we need to do is find out what 29% of 639 is and add it to 639 to find the total.  The easiest way to find a percentage of a number, if you don't know how to calculate it, is by taking 10%.  So 10% of 639 is 63.9.  Now since there is 29%, we need to multiply 63.9 x 2, to get 127.8.  However, we only have 20% out of the 29%.  So we need to find the other 9%.  If 10% is 63.9, then 1% is 6.39.  So we need to multiply 6.39 x 9, and that equals 57.51.  Now, we need to add 127.80 and 57.51 together.  That will give us 185.31.  Add that to the 639, and you have your answer.  Hope this helped!
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Step-by-step explanation:

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Answer:

y = 5/8x - 3

Step-by-step explanation:

(8,2) and (-8,-8)

m=(y2-y1)/(x2-x1)

m = ( -8 -2)/ (-8 - 8)

m = (-10)/(-16)

m = 5/8

y - y1 = m(x - x1)

y - 2 = 5/8(x - 8)

y - 2 = 5/8x - 5

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3 0
2 years ago
Nicole is half as old as Donald. The sum of their ages is 72.<br> How old is Nicole, in years?
PIT_PIT [208]

Answer:

24

Step-by-step explanation:

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3 0
2 years ago
Find the property of this : 5x*(4y+3x)=5x*(3+4y)
7nadin3 [17]
Simplifying
5x(4y + 3x) = 5x(3x + 4y)

Reorder the terms:
5x(3x + 4y) = 5x(3x + 4y)
(3x * 5x + 4y * 5x) = 5x(3x + 4y)

Reorder the terms:
(20xy + 15x2) = 5x(3x + 4y)
(20xy + 15x2) = 5x(3x + 4y)
20xy + 15x2 = (3x * 5x + 4y * 5x)

Reorder the terms:
20xy + 15x2 = (20xy + 15x2)
20xy + 15x2 = (20xy + 15x2)

Add '-20xy' to each side of the equation.
20xy + -20xy + 15x2 = 20xy + -20xy + 15x2

Combine like terms: 20xy + -20xy = 0
0 + 15x2 = 20xy + -20xy + 15x2
15x2 = 20xy + -20xy + 15x2

Combine like terms: 20xy + -20xy = 0
15x2 = 0 + 15x2
15x2 = 15x2

Add '-15x2' to each side of the equation.
15x2 + -15x2 = 15x2 + -15x2

Combine like terms: 15x2 + -15x2 = 0
0 = 15x2 + -15x2

Combine like terms: 15x2 + -15x2 = 0
0 = 0

Solving
0 = 0

Couldn't find a variable to solve for.

This equation is an identity, all real numbers are solutions.
4 0
2 years ago
Read 2 more answers
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