4 years ago

Guys help please again

Mathematics

1 answer:

Svetradugi [14.3K]4 years ago

3 0

Answer:

I would choose B but I'm not sure.

Step-by-step explanation:

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If 42% of a number N is 8.4, what is the value of N?

vfiekz [6]

Answer:

Step-by-step explanation:

1% = .2 so 100%=20

6 0

4 years ago

Simplify: 2/3 + 3/5<br><br> I will give brainliest if I can!

Pani-rosa [81]

The answer would be 19/15 or in other words 1 4/15

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3 years ago

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Evaluate using the finite geometric sum formula

Sever21 [200]

Answer:

$S_9=-18.703$ .

Step-by-step explanation:

The given series is,

$\sum_{i=1}^9(-\frac{1}{2})^{i-1}$

When we substitute $i=1$ , we get the first term, which is $a_1=-28(-\frac{1}{2})^{1-1}$

This implies that,

$a_1=-28(-\frac{1}{2})^{0}$

$a_1=-28(1)=-28$ .

The common ratio is

$r=-\frac{1}{2}$

The finite geometric sum is given by the formula,

$S_n=\frac{a_1(r^n-1)}{r-1} , -1\:$ .

Since there are 9 terms, we find the sum of the first nine terms by putting $n=9$ in to the formula to get,

$S_9=\frac{-28((-\frac{1}{2})^9-1)}{-\frac{1}{2}-1}$ .

$S_9=\frac{-28((-\frac{1}{512})-1)}{-\frac{3}{2}}$ .

$S_9=\frac{-28(-\frac{513}{512})}{-\frac{3}{2}}$ .

$S_9=-28(\frac{171}{256})$ .

$S_9=-\frac{1197}{64}$ .

$S_9=-18.703$ .

The correct answer is B

4 0

3 years ago

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3. On a coordinate grid, the location of a lighthouse is at L, and the location of a buoy is at B. At noon, a ship is at the mid

Tju [1.3M]

Answer:

Step-by-step explanation:

im 50% sure this write dont blame me man

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3 years ago

Pls help me with this maths question

kobusy [5.1K]

Answer:

567094, 567904, 576094, 576904

Step-by-step explanation:

You just have to arrange the numbers from the least value

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3 years ago

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