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3 years ago

Please help ASAP

Mathematics

1 answer:

belka [17]3 years ago

6 0

Answer:

Option B is correct

Step-by-step explanation:

Hope that helped u

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Simplify: 3 · 3^2 + 8 ÷ 2 − (4 + 3)

Radda [10]

Answer:

Step-by-step explanation:

3^3+4-7

27+4-7

4 0

4 years ago

Need help on this too

andrezito [222]

Answer:

I think it is distributive

Step-by-step explanation:

When a single number is next to parentheses, it's called distributive property

I hope this is right :/

Please mark brainliest :/

6 0

3 years ago

Which expression is equivalent to 60 Σ n=1 (2n − 1)2 ? Check all that apply.

Hunter-Best [27]

9514 1404 393

Answer:

B, D

Step-by-step explanation:

The quadratic expands to ...

(2n -1)² = (2n)² +2(2n)(-1) +(-1)² = 4n² -4n +1

The coefficients can be factored out of the sum, so ...

∑(4n²) = 4∑n² for example

The sum of 60 ones is 60:

$\displaystyle\sum_{n=1}^{60}{1}=1+1+1+\dots+1=60$

So, the sum can be written as ...

$\displaystyle\sum_{n=1}^{60}{(2n-1)^2}\\\\=\boxed{4\sum_{n=1}^{60}{n^2}-4\sum_{n=1}^{60}{n}+\sum_{n=1}^{60}{1}}\\\\=\boxed{4\sum_{n=1}^{60}{n^2}-4\sum_{n=1}^{60}{n}+60}$

_____

It appears that the key to choosing the correct answers is paying attention to signs.

7 0

3 years ago

Read 2 more answers

Which number is rational?

OlgaM077 [116]

Answer:

its the square root of 16

Step-by-step explanation:

because while 10 and 2 are whole numbers when you place the root it can't be expanded and pi is irrational

4 0

3 years ago

PLSSSSSSSSSSSS HELP MEEEEE

guapka [62]

Answer:

Step-by-step explanation:

1/2 * 8 * 15 * x=3360 c^3

x = 56 units

6 0

2 years ago