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DENIUS [597]
3 years ago
5

Please help ! matching for 21-32 and please explain ! thanks :) preparing for exam​

Mathematics
1 answer:
iragen [17]3 years ago
7 0

Answer:

I'm very sorry, but there is no questions 21-23, if you give me the picture, I'll do it.

Step-by-step explanation:

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What does The difference of two numbers by 5 look like
stiks02 [169]

Answer:


Step-by-step explanation:

Let the larger number = x

Let the smaller number = y

I can't really tell if I'm reading it correctly, but I think the answer is

x - y = 5

7 0
3 years ago
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Find the products.please please please please please help me! I’m desperate!
Dmitry_Shevchenko [17]

Answers:

5) product is 35ax^2 - 42axy + 7y^2

6) product is -a^6b^2 - 8a^5b - 5a^4

7) product is 12x^5y + 6x^4y^2 + 21x^3y^3

8) product is 3x^3y^2 - 6x^3y + 3x^5y - 3x^4y

9) product is x^{3n} + 7x^{n+1} - 3x^n

=============================================

Explanation:

For each of these questions, you'll multiply the term outside by each term inside the parenthesis. I'm using the distributive property.

In problem 5, we multiply the outer 7a by the following terms inside like so

7a(5x^2-2xy+y^2-4xy)\\\\7a(5x^2-6xy+y^2)\\\\7a(5x^2)+7a(-6xy)+7a(y^2)\\\\35ax^2-42axy+7ay^2\\\\

The other problems will have similar steps.

--------

A useful rule to keep in mind is that a^b*a^c = a^{b+c}

For example, x^2*x^3 = x^{2+3} = x^5

3 0
3 years ago
Find a formula for the sum of the first n even integers : 2 + 4 + 6 + ... + 2n.
Sedbober [7]

Let S be the sum,

S = 2 + 4 + 6 + ... + 2 (n - 2) + 2 (n - 1) + 2n

Reverse the order of terms:

S = 2n + 2 (n - 1) + 2 (n - 2) + ... + 6 + 4 + 2

Add up terms in the same positions, so that twice the sum is

2S = (2n + 2) + (2n + 2) + (2n + 2) + ... + (2n + 2)

or

2S = n (2n + 2)

Divide both sides by 2 to solve for S :

S = n (n + 1)

7 0
2 years ago
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Answer:

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Step-by-step explanation:

6 0
3 years ago
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One leg of a right triangle has a length of 7 m. The other side have lengths that are consecutive integers. Find these lengths
Darina [25.2K]

Answer:

6 and 5

Step-by-step explanation:

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3 years ago
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