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JulijaS [17]
3 years ago
11

What are the steps to simplify the expression (6x2 − 3 − 5x3) − (4x3 + 2x2 − 8).

Mathematics
2 answers:
gregori [183]3 years ago
8 0
I'm not very good at math but this is probably correct.
1. 6x2 - 3 - 5x3= -6
2. 4x3 + 2x2 -8 = 8
3. -6 - 8
4. = -14
never [62]3 years ago
8 0
<span>Equation: (6x2 − 3 − 5x3) − (4x3 + 2x2 − 8)
Start by doing the multiplication in the parenthesis:</span><span> (12 − 3 − 15) − (12 + 4 − 8)
Next, do the addition in the parenthesis:</span> (12 − 3 − 15) − (16 − 8)
Next, subtract: (-6) − (8)
Subtract once more:  (-6) − 8 = (-14)

 (6 x 2 − 3 − 5 x 3) − (4 x 3 + 2 x 2 − 8) = (-14)

Hope this helped!
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To sew a garment, a seamstress uses 5.7 centimeters of thread for every 7.6 centimeters of fabric.
JulijaS [17]

Answer:

Part a) 5.6\ cm of fabric

Part b) 15.9\ cm of thread

Step-by-step explanation:

we know that

A seamstress uses 5.7 centimeters of thread for every 7.6centimeters of fabric

Part a)

by proportion

Find how much fabric is involved if the seamstress uses 4.2 centimeters of thread

\frac{7.6}{5.7}\frac{cm\ fabric}{cm\ thread} =\frac{x}{4.2}\frac{cm\ fabric}{cm\ thread} \\ \\x=4.2*7.6/5.7\\ \\x=5.6\ cm\ fabric

Part b)

by proportion

Find how many centimeters of thread is needed if the seamstress is working with 21.2 centimeters of fabric

\frac{7.6}{5.7}\frac{cm\ fabric}{cm\ thread} =\frac{21.2}{x}\frac{cm\ fabric}{cm\ thread} \\ \\x=5.7*21.2/7.6\\ \\x=15.9\ cm\ thread


5 0
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8 less than six times a number y
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3 0
3 years ago
8y + 6 + 8x + y + 3<br><br><br> its too short so im adding more characters
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If you assume the rental cost changes in a linear fashion, the change over 6 years was $44. The "unit rate of change" is then $44/(6 years) ≈ $7.33/year.

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What number is needed to complete the pattern below? 5 10 3 15 20 13 25 30 __?
djverab [1.8K]
23
because
the pattern is
(5 10) ..1.. (15 20) ..2.. (25 30) ..3..


..1... = 3
..2.. = 13
so ..3.. = 23
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3 years ago
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