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viva [34]
3 years ago
13

Please answer quicklyexpand and simplify: 4(5x-3y) (x-4y) -(3x-4y)(2x+3y)​

Mathematics
1 answer:
Gekata [30.6K]3 years ago
5 0

Answer: 14x^2-93xy+60y^2 Hope that helps!

Step-by-step explanation:

1. Expand by distributing terms

(20x-12y)(x-4y)-(3x-4y)(2x+3y)

2. Use the Foil method:(a+b)(c+d)= ac+ad+bc+bd

20x^2-80xy-12yx+48y^2-(3x-4y)(2x+3y)

3. Use the Foil method : (a+b)(c+d)= ac+ad+bc+bd

20x^2-80xy-12yx+48y^2-(6x^2+9xy-8yx-12y^2)

4. Remove parentheses 20x^2-80xy-12yx+48y^2-6x^2-9xy+ 8yx+12y^2

5. Collect like terms (20x^2-6x^2)+(-80xy-12xy-9xy+8xy)+(48y^2+12y^2)

6. Simplify.

And your answer would be 14x^2-93xy+60y^2

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a rectangles perimeter and area have the same numerical value. the width of the rectangle is 9 units . what is the length of the
attashe74 [19]

Answer:

Step-by-step explanation:

let the length of rectangle=l units

width=9

p=2(l+9)

area=9l

9l=2(l+9)

9l=2l+18

7l=18

l=18/7 units

5 0
3 years ago
ellas umbrella is 2 feet long. freds umberllla is 22 inches long whos umbrella is longer. How much longer
Damm [24]

Answer:

Ella's by 2 inches

Step-by-step explanation:

One foot equals 12 inches. 2 feet would be 24 inches because 2×12=24 so therefore Ella's umbrella is longer.

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3 years ago
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(-111)

Step-by-step explanation:

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3 years ago
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$67.50 with 8% sales tax
inna [77]

Answer:

The answer is 73.05

Step-by-step explanation:

To find the answer simply multiply 67.50 by 0.08 and then add that to 67.50

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3 years ago
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pentagon [3]

Answer:

The answer to your question is letter A. Regular size is cheaper than Economy size by $0.0003 per gram

Step-by-step explanation:

Cost of 1 gr of economy size

  5000 gr (5 kg) -------------------  $ 5.15

         1 gr            --------------------     X

x = 1 x 5.15 / 5000 = $0.0010

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       1 gr --------------------   x

x = 1 x 0.6 / 820 = $ 0.0007

Difference of cost  = $0.0010 - $0.0007 = $0.0003

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