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ANEK [815]
3 years ago
15

Complete the following: (2x +5y)(2x − 5y)= ____ - _____

Mathematics
1 answer:
Kay [80]3 years ago
7 0

Answer:

(2x +5y)(2x − 5y)  = {4x^{2}  - 25y^{2}

Step-by-step explanation:

(2x +5y)(2x − 5y) is the given equation.

Now, the <u>ALGEBRAIC IDENTITY</u> states that:

(a+ b)(a-b) = a^{2}  - b^{2}

Here, comparing a = 2x  and b = 5y,

we get (2x +5y)(2x − 5y)  = (2x)^{2}  - (5y)^{2}

on further solving the right side, we get

(2x +5y)(2x − 5y)  = {4x^{2}  - 25y^{2}

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12 10,9,68,12<br> What is the most appropriate measure of center?
valentina_108 [34]

Answer: The most appropriate measure of center is the median.

Step-by-step explanation:

  • The measure of center generally represented by 1) mean 2) median 3) mode.
  • Mean is the best measure to represent the center of the data but when data have outliers it gets affected badly.
  • In that case, we use the Median as the best measure of center.

The given data is 12 10,9,68,12 .

As it can be seen that, the data have extreme value 68 ( called outliers).

In this case, we will use the Median as the best measure of center.

So, the most appropriate measure of center is the median.

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3 years ago
Help me with this please. :(
Digiron [165]

Answer:

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3 years ago
.Two angles in a triangle have measures of
Neporo4naja [7]

Answer:

38 I'm 90% sure here so sorry if I am wrong

Step-by-step explanation:

8 0
2 years ago
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Help please Question is in the picture
anzhelika [568]

Answer:

360 degrees in total.

Step-by-step explanation:

We are given that the m∠1 is 145 degrees, and because ∠1 and ∠2 form a straight line we can tell that 180-145 = 35.

So now here's what we know:

m∠1 = 145

m∠2 = 35

After that, we need to look at ∠5 and ∠6.

One thing we can notice right away is that ∠5 and ∠6 should measure the same as ∠1 and ∠2 (respectively) because they are corresponding angles.

Now we will add them all together to find the sum of all four angles.

m∠1 = 145 + m∠2 = 35 = 180

m∠5= 145 + m∠6 = 35 = 180

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8 0
3 years ago
Express the ratio as a fraction in simplest form. 15:45 2/3 3/9 1/3 5/16
ankoles [38]

Answer:

3/9

Step-by-step explanation:

15/45

divide both sides by a factor of each number; I'll be using 5.

3/9

It didn't have to be 5, I could have used 3, but in that case It wouldn't have been it's simplest form and I would have to divide again by another factor.

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2 years ago
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