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Vitek1552 [10]
3 years ago
7

I neeeeeedddd help pls

Mathematics
2 answers:
Gre4nikov [31]3 years ago
6 0
I CAN HELP YOUUUUUUUUUUUUUUUUUU!!!!!!!!!!!!!!!!!!1

lets distribute 7(x+3)

so 7(x)+7(3)

7x+21  or b

yay :)

Digiron [165]3 years ago
5 0
The expression that is equivalent to 7(x + 3) is B. 7x + 21

Explanation:
This expression demonstrates the distributive property. For the distributive property, it tells us that we can remove the parenthesis if the term that the polynomial is being multiplied by is distributed to, or multiplied with each term inside the parenthesis .

Now let's go back to the problem

7(x + 3)

now by applying the Distributive Propery

7 * x + 7 * 3
The parentheses are removed and each term from inside is multiplied by the 7.

Now we can simplify the multiplication of the individual terms:

7x + 21
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Step-by-step explanation:

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Suppose that the functions q and r are defined as follows.
satela [25.4K]

Answer:

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(q o r)(2) = 14

Step-by-step explanation:

Given

g(x) = x^2 + 5

r(x) = \sqrt{x + 7}

Solving (a): (r o q)(2)

In function:

(r o g)(x) = r(g(x))

So, first we calculate g(2)

g(x) = x^2 + 5

g(2) = 2^2 + 5

g(2) = 4 + 5

g(2) = 9

Next, we calculate r(g(2))

Substitute 9 for g(2)in r(g(2))

r(q(2)) = r(9)

This gives:

r(x) = \sqrt{x + 7}

r(9) = \sqrt{9 +7{

r(9) = \sqrt{16}{

r(9) = 4

Hence:

(r o g)(2) = 4

Solving (b): (q o r)(2)

So, first we calculate r(2)

r(x) = \sqrt{x + 7}

r(2) = \sqrt{2 + 7}

r(2) = \sqrt{9}

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Next, we calculate g(r(2))

Substitute 3 for r(2)in g(r(2))

g(r(2)) = g(3)

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g(3) = 3^2 + 5

g(3) = 9 + 5

g(3) = 14

Hence:

(q o r)(2) = 14

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For people to comprehend the structure of their world, congruence is a crucial mathematical concept. Young children's daily interactions with congruence enable them to build innate perceptions of this geometric relationship.

Congruent:

If the size and shape of two triangles are same, they are said to be congruent. Three equal sides and identical angles are shared by two congruent triangles with regard to one another. Corresponding Parts of Congruent Triangles are Congruent is referred to by the theorem CPCTC. According to the CPCTC theorem, whenever two triangles are congruent, then each of their corresponding parts are also congruent. In other words, if two or more triangles are congruent, then their corresponding sides and angles are also congruent or equivalent in size.

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