3 years ago

3(x+7)^2 ............

Mathematics

2 answers:

cestrela7 [59]3 years ago

6 0

Answer:

147

Step-by-step explanation:

posledela3 years ago

4 0

The answer would be 6x+42

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A bookstore has a sale. When customers pay for 2 books, they get another book free. If Pay pays for a book of 16 books, how many

svetlana [45]

Answer:

16/ 2=8

after dividing you get 8

8+2=10

he gets 10 free books

and paid for 6

Step-by-step explanation:

hope this helps if not i'm sorry and good luck!

5 0

3 years ago

Simplify 5(5t+6)+2 (2t-3)

yan [13]

Answer:

29t + 24

Step-by-step explanation:

5(5t + 6) + 2(2t - 3)

Open Parentheses first.

5* 5t = 25t

5 * 6 = 30

25t + 30 + 2(2t - 3)

Open others

2 * 2t = 4t

2 * 3 = 6

25t + 30 + 4t - 6

Match like terms

29t + 24

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3 years ago

Evaluate the given integral by changing to polar coordinates. sin(x2 + y2) dA R , where R is the region in the first quadrant be

koban [17]

Set

$\begin{cases}x=r\cos\theta\\y=r\sin\theta\end{cases}\implies\mathrm dA=r\,\mathrm dr\,\mathrm d\theta$

The region $R$ is given in polar coordinates by the set

$R=\left\{(r,\theta)\mid2\le r\le3,0\le\theta\le\dfrac\pi2\right\}$

So we have

$\displaystyle\iint_R\sin(x^2+y^2)\,\mathrm dA=\int_0^{\pi/2}\int_2^3r\sin(r^2)\,\mathrm dr\,\mathrm d\theta=\boxed{\frac\pi4(\cos4-\cos9)}$

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3 years ago

X < -10/3 or x > 2/3

Fittoniya [83]

Hello! :)

Here is a graph for x < -10/3 or x > 2/3.

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3 years ago

You are constructing a line perpendicular to line y through point X, which is not on line y. Which of the following is not a nec

sergiy2304 [10]

Answer:Ur answer is C

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3 years ago