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3 years ago

PLEASE HELP A GIRL OUT!!

Mathematics

2 answers:

lbvjy [14]3 years ago

6 0

Answer:

I think its c

Step-by-step explanation:

Sidana [21]3 years ago

5 0

Answer:

Step-by-step explanation:

It is C because the question asks for 1/4th of the wholw angle =45 degrees

hope this helps

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Melany jogged 6 more miles than Zariana. All together they jogged 18 miles last week. How far did each person jog last week. I n

Aleksandr [31]

Answer:

Melany jogged 12 miles and Zariana jogged 6 miles.

Step-by-step explanation:

18-12=6

12-6=6

I think that is the answer! GL!!

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3 years ago

Write an equation and solve: At Trader Joes, Mrs.

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6.94-4.99= 1.95

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3 years ago

Write the following number in word form. 8,409,120

Elanso [62]

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4 years ago

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What is the solution to the system of equations? x=4y+6 x-3y=4

dem82 [27]

$\left \{ {{x=4y+6} \atop {x-3y=4}} \right. \\\\
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6 0

4 years ago

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What is the sum of the first 51 consecutive odd positive integers?

Angelina_Jolie [31]

We call:

$a_{n}$ as the set of the first 51 consecutive odd positive integers, so:

 $a_{n} = \{1, 3, 5, 7, 9...\}$

Where:
$a_{1} = 1$
$a_{2} = 3$
$a_{3} = 5$
$a_{4} = 7$
$a_{5} = 9$
and so on.

In mathematics, a sequence of numbers, such that the difference between two consecutive terms is constant, is called Arithmetic Progression, so:

3-1 = 2
5-3 = 2
7-5 = 2
9-7 = 2 and so on.

Then, the common difference is 2, thus:

 $a_{n} = \{ a_{1} , a_{1} + d, a_{1} + d + d,..., a_{1} + (n-2)d+d\}$

Then:

 $a_{n} = a_{1} + (n-1)d$

So, we need to find the sum of the members of the finite series, which is called arithmetic series:

There is a formula for arithmetic series, namely:

 $S_{k} = ( \frac{a_{1} + a_{k}}{2} ).k$

Therefore, we need to find:
 $a_{k} = a_{51}$

Given that $a_{1} = 1$ , then:

$a_{n} = a_{1} + (n-1)d = 1 + (n-1)(2) = 2n-1$

Thus:
$a_{k} = a_{51} = 2(51)-1 = 101$

Lastly:

$S_{51} = ( \frac{1 + 101}{2} ).51 = 2601$

4 0

3 years ago