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3 years ago

1. A person owns a collection of 30 CDs, of which 5 are country music. If 2 CDs are selected at

Mathematics

2 answers:

OverLord2011 [107]3 years ago

5 0

Answer:

Step-by-step explanation:

Sunflower can u please come answer my question next it says

HELP ASAP WILL GIVE BRAINLIEST PLEASE IM DESPERATE!!!!!!!

kozerog [31]3 years ago

3 0

First you have 30 cds and 5 if them are country.

You have 5/30 chance to take one country = 0.1666...= 16,6%

Next time you gonna pick up one you have 29 cds and 4 country

4/29= 0,1379=13,8%

You might be interested in

What is the value of k ? 1/2 k+6=4k-8 -4 -3 3 4

nasty-shy [4]

The value of k in 

1/2 k+6=4k-8

is 4

7 0

3 years ago

Can someone help me on letters B and C?

skelet666 [1.2K]

Step-by-step explanation:

if he is just talking about the length than it is,

4(13x + 8)

of he is talking about overall length he swam than,

4(13x + 8) + 3(7x - 2)

if x = 12

than

perimeter = 2l + 2b

so, after inserting the values we got,

→ 2[13(12) + 8] + 2[7(12) - 2]

→ 2 (156 + 8) + 2(84 - 2)

→ 2 × 164 + 2 × 82

→ 328 + 164

→ 492 ft. ← perimeter

and yeah, according to me

a is wrong as,

formula of perimeter = 2l + 2b or 2(l+b)

so, the answer should be,

2(13x + 8) + 2(7x - 2) or 2 [ (13x + 8) + (7x - 2)

hope this answer helps you dear...take care and may u have a great day ahead!

4 0

2 years ago

X+10=2x-4 what does x=

kobusy [5.1K]

X=14

Step by Step

x+10=2x-4
-x. -x

10=x-4
+4. +4

x=14

4 0

3 years ago

Read 2 more answers

The base of a solid in the region bounded by the two parabolas y2 = 8x and x2 = 8y. Cross sections of the solid perpendicular to

Usimov [2.4K]

The two curves intersect at two points, (0, 0) and (8, 8):

$x^2=8y\implies y=\dfrac{x^2}8$

$y^2=\dfrac{x^4}{64}=8x\implies\dfrac{x^4}{64}-8x=0\implies\dfrac{x(x-8)(x^2+8x+64)}{64}=0$

$\implies x=0,x=8\implies y=0,y=8$

The area of a semicircle with diameter $d$ is $\dfrac{\pi d^2}8$ . The diameter of each cross-section is determined by the vertical distance between the two curves for any given value of $x$ between 0 and 8. Over this interval, $y^2=8x\implies y=\sqrt{8x}$ and $\sqrt{8x}>\dfrac{x^2}8$ , so the volume of this solid is given by the integral