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2 years ago

PLEASE ANSWER!!!!! ASAP

Mathematics

1 answer:

klasskru [66]2 years ago

8 0

Answer:

10÷4

Step-by-step explanation:

you first add 1+2+3+4

then you divide by the numbers you have.

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xz_007 [3.2K]

B because its in parenthesis, x to the square and y to the square

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3 years ago

8) A box of 12 light bulbs fell

katovenus [111]

Answer: 2/3

Step-by-step explanation:

12 lightbulbs and 4 are broken

12-4=8

8/12

4/6

2/3

3 0

2 years ago

Sophie planted seeds in

saw5 [17]

Answer:

idk

Step-by-step explanation:

6 0

3 years ago

Y^2-2y+1=x+5<br><br> Make y the theme of the formula in the equation

Tanzania [10]

Answer: y = 1 +/- $\sqrt{x+5}$

<u>Step-by-step explanation:</u>

y² - 2y + 1 = x + 5

(y - 1)² = x + 5

$\sqrt{(y-1)^{2}} = \sqrt{x+5}$

y - 1 = +/- $\sqrt{x+5}$

y = 1 +/- $\sqrt{x+5}$

7 0

3 years ago

Please teach me on how to answer this question. (addmath question)

arsen [322]

We know that $\overline{x}=8$ so:

$\overline{x}=8\\\\\\\dfrac{\sum\limits_{k=1}^7\,x_k}{7}=8\qquad|\cdot7\\\\\\ \boxed{\sum\limits_{k=1}^7\,x_k=56}$

We want to calculate:

$\sum\limits_{k=1}^7\,\big(2x_k-3\big)^2=\sum\limits_{k=1}^7\,\big(4x_k^2-12x_k+9\big)=\\\\\\=\sum\limits_{k=1}^7\,4x_k^2-\sum\limits_{k=1}^7\,\big12x_k+\sum\limits_{k=1}^7\,9=4\sum\limits_{k=1}^7\,x_k^2-12\sum\limits_{k=1}^7\,x_k+\sum\limits_{k=1}^7\,9=\\\\\\=4\cdot672-12\cdot56+7\cdot9=2688-672+63=\boxed{2079}$

5 0

3 years ago