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Makovka662 [10]
3 years ago
11

Hi please help me with these questions asap.​

Mathematics
1 answer:
Alex Ar [27]3 years ago
8 0

Step-by-step explanation:

A. r=42/2=21

B.

{21}^{2} \pi + 60 \times 42 =  \\  = 441\pi + 2520

C.

42\pi + 60 \times 2 =  \\  = 42\pi + 120

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A person eating at a cafeteria must choose 4 of the 13 vegetables on offer. calculate the number of elements in the sample space
Serggg [28]

A person eating at a cafeteria must choose 4 of the 13 vegetables on offer. calculate the number of elements in the sample space for this experiment.

Answer: The number of elements in the sample space for this experiment can be found using the combination formula because the order does not matter here.

Therefore, the number of elements in the sample space for this experiment is:

13C4=\frac{13!}{(13-4)!4!}

              =\frac{13!}{9! \times 4!}

              =\frac{6227020800}{8709120}

              =715

Therefore, the number of elements in the sample space for this experiment is 715.

7 0
4 years ago
1,935round to the nearest thousand
vampirchik [111]
1935 rounded to the nearest thousand = 2000....because it is closer to 2000 then to 1000.
6 0
4 years ago
In parallelogram RSTU, SW = 4 cm, WT = 6 cm, RS = 5 cm, and ST = 7 cm.
zaharov [31]

<u>Answer-</u>

<em>The length of line segment WU is</em><em> 4 cm</em><em>.</em>

Option 1. 4 cm is correct.

<u>Solution-</u>

As given that, RSTU is an parallelogram.

RT and SU are its two diagonals. They intersect each other at point W.

Properties of parallelogram is that they bisect each other.

i.e SW = WU and RW = WT

As given that, SW = 4 cm.

So, WU = SW = 4 cm

Therefore, the length of line segment WU is 4 cm.

8 0
4 years ago
Read 2 more answers
Solve 5x + 4/y =7 and 4x + x/y =5 simultaneously.​
Nuetrik [128]

9514 1404 393

Answer:

  (x, y) ≈ (1.1642, 3.3930) and (3.4358, -0.39297)

Step-by-step explanation:

Solve the first equation for y, then substitute into the second.

  5x +4/y = 7

  4/y = 7 -5x

  4/(7 -5x) = y

Then the second equation becomes ...

  4x +x/(4/(7 -5x)) = 5

  4x +x(7 -5x)/4 = 5

  16x +7x -5x^2 = 20 . . . . . multiply by 4

  5x^2 -23x +20 = 0 . . . . . put in standard form

We can use the quadratic formula to solve this.

  x = (23±√((-23)² -4(5)(20)))/(2(5)) = (23±√129)/10

  x = 2.3 ±√1.29 ≈ {1.1642, 3.4358}

  y = 4/(7 -5x) = {3.3930, -0.39297}

Solutions are (x, y) ≈ (1.1642, 3.3930) and (3.4358, -0.39297).

5 0
4 years ago
30 PT AND BRAINLIEST (pics are below)
Komok [63]
1) C 392 in2

2) 125cm³

3) D 64 in3
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