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2 years ago

On Friday, 0.325 of the students in

Mathematics

1 answer:

stiv31 [10]2 years ago

8 0

It would be c because you move two times the decimal dot to the right, that’s how you get the answer

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11. Find the sum of the arithmetic series. overset [22] underset{k=1}\huge{Sigma) (-4k - 13) =

sergiy2304 [10]

Answer:

okay, we need to add up for all k=1 till k=22

we could do it like this

(-4*1 -13) + (-4*2 -13) + (-4*3 -13) + ...

but this is long and boring, so we need another valid, yet vastly faster method to calculate this sum

we know that the "-13" part will occur 22 times, so let's write this component as "-13*22"

the -4k gents bigger with each step, k will take all the natural numbers from 1 to 22

so we could write

"-4 * (1+2+3+4+5+6+7...+21+22l

alot simpler and faster, but not fast enough

let's add up all numbers from 1 to 22 into one number

1 + 22 = 23

2 + 21 = 23

3 + 20 = 23

...

this works eleven times (bc we use up 2 numbers in each step), so the numbers from 1 to 22 added up are just

23*11= 230+23 = 252

now let's construct the final calculation

-4 * 252 -13*22 = -1294

there's your sum.

hope it helps you overall.

brainliest would be very kind ic some else leaves an answer, may it be just a greeting

4 0

2 years ago

Abc2 at a = 4, b = 1/4, c = 5

Aloiza [94]

Look at the attached picture

Hope it will be helpful to you...

8 0

2 years ago

Help me please I need the answer

Lisa [10]

Answer:

I not sure but I think it's A

Step-by-step explanation:

Daniel had 5 rose bushes and and 6 pots of moss which equaled 132. Hannah spent 228 on 10 rose bushes and 9 pots, A basically explains that.

6 0

2 years ago

Suppose 3 plss helppp ?

lord [1]

???? what is the question

6 0

1 year ago

3. The perimeter of a rectangular playing field is 504 yards. The area of the

Len [333]

The perimeter is twice the sum of the length and the width:

$P = 2(w+l)$

The area is the product of the dimensions:

$A = wl$

So, the system is

$\begin{cases}w+l=504\\w\cdot l=14276\end{cases}$

4 0

3 years ago