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scZoUnD [109]
3 years ago
5

I need help on this question. I don't want to get a bad grade. -_-

Mathematics
1 answer:
ch4aika [34]3 years ago
4 0

Answer:

60.84 m

Step-by-step explanation:

The perimeter is the distance around

The distance around the 3 sides of the rectangle are

15+12+15

42

Now we are going 1/2 way around the circle

That is 1/2 of the circumference

1/2 C = 1/2 pi *d

         = 1/2 pi *12

          = 6pi

Using 3.14 for pi

          = 6 (3.14)

          =18.84

Add these together

42+18.84

60.84 m

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Write an<br> explicit formula for An, the nth term of the sequence 7, -42, 252, ....
erik [133]

Answer:

A_n = 7(-6)^{n-1}

Step-by-step explanation:

<u>Key skills needed: Explicit formula, Geometric sequence</u>

1) This is a geometric sequence, meaning a constant (like 6 or 3.5) is being multiplied to every term. First we need to find the constant.

This can be done by doing -42 ÷ 7   or   252 ÷ -42

-42 ÷ 7 equals -6.

252 ÷ -42 also equals -6.

2) This means that constant is -6.

3) The general form for an explicit formula of a geometric sequence is:

a_n = a_1(r)^{n-1}

--> r means the constant (or common ratio) that is being multiplied.

--> a_1 means the first term

--> a_n means the "nth" numbered term (so a_3 is the 3rd term, a_{10} is the 10th term and so on).

--> n-1 is just the "n" in a_n minus 1.

4) We can use this formula to create an explicit formula for the geometric sequence in the problem.

--> r = -6 (Since we got -6 as the constant/common ratio).

--> a_1  = 7 (Since 7 is the 1st term)

This means that our formula would be --> A_n = 7(-6)^{n-1}

<em>Hope you understood and have a nice day!! :D</em>

8 0
3 years ago
A storm Flori performance most of the daily unit counts but the owner personally recorded that there was 61 units remaining afte
Kruka [31]

Answer:

  y = -2.8x +69.4

Step-by-step explanation:

The 2-point form of the equation of a line can be used to find the equation of the line through points (3, 61) and (13, 33). The general form of it is ...

   y = (y2-y1)/(x2-x1)·(x -x1) +y1

For the given points, this is ...

  y = (33 -61)/(13 -3)·(x -3) +61

  y = -28/10(x -3) +61

  y = -2.8x +69.4 . . . . . the equation of the line through the given points

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<em>Comment on the problem</em>

A "line of best fit" is one that minimizes some measure of deviation from the line. Usually, what is minimized is the square of the deviations. Choosing two points to draw the line through may be convenient, but does not necessarily result in a line of best fit.

7 0
3 years ago
Please tell me the answer for both
Anna007 [38]
Answer: Number one is C and number two is B
8 0
3 years ago
Scarlet open a savings account and deposited $100 as principal. The account earns 10% interest, compounded yearly. What is the b
koban [17]

Answer:

190

Step-by-step explanation:

100x10x9/100=90

balance=100+90=190

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3 years ago
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Answer:

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Step-by-step explanation:

P = 2(L + W)

36 = 2(L + 3)

18 = L + 3

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2 years ago
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