2 years ago

Find the difference of (2x+5)(2x-5)

Mathematics

1 answer:

san4es73 [151]2 years ago

3 0

Answer:

4x2−25

Step-by-step explanation:

(2x+5)(2x−5)

=(2x+5)(2x+−5)

=(2x)(2x)+(2x)(−5)+(5)(2x)+(5)(−5)

=4x2−10x+10x−25

4x2−25

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Kindly answer this one. Thank you.

steposvetlana [31]

Answer:

See below.

Step-by-step explanation:

I'm assuming these questions are about the Midline Theorem (segment AL joins the midpoints of the non-parallel sides.

♦ The midline's length is the average of the lengths of the top and bottom parallel sides.

$AL=\frac{OR+CE}{2}$

Use this equation and substitute values given in each problem, then solve for the missing information.

1. AL = x, CE = 9, OR = 5

$x=\frac{9+5}{2}=7$

2. AL = <em>m</em> - 4, CE = 15, OR = 17

$m-4=\frac{15+17}{2}=16\\\\m-4=16\\\\\\m=20\\\\AL=20-4=16$

3. OR = y + 5, AL = 15, CE = 18

$15=\frac{(y+5)+18}{2}\\\\15=\frac{y+23}{2}\\\\30=y+23\\\\7=y\\\\OR = 7+5=12$

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2 years ago

A walkway forms one diagonal of a square playground. the walkway is 16 m long. how long is a side of the playground?

prohojiy [21]

Side of the playground would be : a²+a² = 16²

2a² = 256

a² = 128

a = √128

a = 11.31 m

3 0

3 years ago

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If a meatball recipe calls for 10 pounds of ground beef is 5 kilograms of ground beef enough to make the meatballs

rodikova [14]

Answer: Yes. 5 kilograms is a little more than enough.

Step-by-step explanation:

Use the conversion factor. 1 kilogram = 2.20462 pounds

We can round that to 2.2 for a question like this.

5 × 2.2 = 11 pounds

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2 years ago

Find the value of Tan O for the angle shown.

Maru [420]

C because that’s what it is

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2 years ago

What is the square root of 5304 4 times

sesenic [268]

21216 i multiplyed 5304 x 4

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