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zlopas [31]
3 years ago
14

How do I do (5y-4)^2 with steps? Thank you!

Mathematics
2 answers:
insens350 [35]3 years ago
8 0
(5y-4)^2 \\ \\ (5y)^2 - 2 \times 5y \times 4 + 4^2 \ \textless \ -- square \ of \ difference \\ \\ 5^2y^2-2 \times 5y \times 4 + 4^2 \ \textless \ -- distributive \ property \\ \\ 25y^2 - 2 \times 5y \times 4 + 4^2 \ \textless \ -- simplify \\ \\ 25y^2 - 2 \times 5y \times 4 + 16 \ \textless \ -- simplify \\ \\ 25y^2 - 40y + 16 \ \textless \ -- simplify \\ \\ Answer: 25y^2 - 40y + 16
True [87]3 years ago
7 0
<span>first, you have to turn (5y-4)^2 into (5y-4)(5y-4).
From there, you would FOIL, or multilpy the 5y by the 5y, which is 25y^2, the multiply the 5y by the -4, which is -20y, then multiply the -4 by the 5y which is -20y, and then multiply the -4 by the -4, which is 16. It would then look like this: 25y^2 - 20y - 20y +16. Then you would add (or in this case, subtract) like terms. You would add -20y and -20y, which is -40y. The end expression would be 25y^2 - 20y +16. Hope this helps!

</span>
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What is the diameter of a circular field whose area is 616cm^2<br><br>​
Oksana_A [137]

Answer:

<h2>28cm</h2>

Step-by-step explanation:

d=2\sqrt{\frac{A}{\pi}} =2\sqrt{\frac{616}{\pi} }≈28.00563cm

rounding 28.00563 to 28.

So hence, your answer is 28cm

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Thanks!

Have a great day!

~ms115~

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2 years ago
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This the correct answer

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3 years ago
dave is painting a fence in his uncle's yard he painted 2 sections of the fence in 30 minutes Dave has 9 sections to paint. if D
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7 0
2 years ago
#8 please. GCF of 117, 99, and 126
Advocard [28]
The factors of 117 are: 1, 3, 9, 13, 39, and 117
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2 years ago
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