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3 years ago

ILL MARK U BRAINLIEST!!

Mathematics

2 answers:

mart [117]3 years ago

7 0

Answer:

The answers are A, C, D, and E.

Step-by-step explanation:

I just multiplied 45 by how many hours and if the answer was the miles it was correct.

I hope this helped and if it did I would appreciate it if you marked me Brainliest. Thank you and have a nice day!

algol [13]3 years ago

5 0

The correct answer would be choice A

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Using mathematical induction prove whether or not the following statement is true for all positive integers n, or show why it is

aniked [119]

Base case: For $n=1$ , the left side is 2 and the right is $2\cdot1^2=2$ , so the base case holds.

Induction hypothesis: Assume the statement is true for $n=k$ , that is

$2+6+10+\cdots+4k-2=2k^2$

We want to show that this implies truth for $n=k+1$ , that

$2+6+10+\cdots+4k-2+4(k+1)-2=2(k+1)^2$

The first $k$ terms on the left reduce according to the assumption above, and we can simplify the $k+1$ -th term a bit:

$\underbrace{2+6+10+\cdots+4k-2}_{2k^2}+4k+2$

$2k^2+4k+2=2(k^2+2k+1)=2(k+1)^2$

so the statement is true for all $n\in\mathbb N$ .

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4 years ago

What is the exterior angle sum for a 252-gon?

Sedbober [7]

Answer: 360

Step-by-step explanation: Anytime it asks for the exterior sum it will always be 360

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3 years ago

An online book store sells e-books on their website. Each book is the same price. The cost to purchase 5 e-books is $8.00.

Yuki888 [10]

Answer:

25 e books

Step-by-step explanation:

because you multiply the money by 5 which gets you 40. Then you multiply the number of e books by 5 and you get 25.

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3 years ago

Each letter represents a digit. The sum of every three consecutive digits is 19.What digit is S?

frozen [14]

9514 1404 393

Answer:

5⬥ = ▼

Step-by-step explanation:

Let's use T, D, C, S to represent the numbers of triangles, diamonds, circles, and squares on each balance. We are given ...

T +D = C . . . . [eq1]

T = D +S . . . . [eq2]

2C = 3S . . . . [eq3]

Using [eq2] to substitute for T in [eq1], we have ...

(D +S) + D = C

Substituting for C in [eq3] gives ...

2(2D +S) = 3S

4D +2S = 3S . . . . . eliminate parentheses

4D = S . . . . . . . . . . subtract 2S

Substituting this into [eq2], we have ...

T = D +4D

T = 5D . . . . . . . . . collect terms. This answers the question.

5⬥ are needed to balance the scale

_____

<em>Additional comment</em>

We cannot tell the intent of "Each letter represents a digit. The sum of every three consecutive digits is 19." No letters are shown.

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3 years ago

Which expression is equivalent to (3x + 2 - 3y) (3x + 2 + 3y)?

MA_775_DIABLO [31]

The answer is C 9x^2+12x+4-9y^2

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3 years ago