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andreev551 [17]

3 years ago

14

In a class 30 of students, 22 have a brother and 25 have a sister. There are 2 students who do not have any siblings. What is th

e probability that a student chosen randomly from the class does not have a sister?

1 answer:

nignag [31]3 years ago

6 0

Answer:

n(P) = n(S) divide n(s)

= 2divide 30

=1/15Ans

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PLEASE HELP!!! GIVING 40 POINTS!!!

Jobisdone [24]

Answer:

a no solution

b is all real numbers

c x=12

Step-by-step explanation:

a has no values of x that make it true

b any value of x makes it true

c simplify both sides of the equation then isolate x

4 0

3 years ago

mash [69]

Answer:

1. Infinitely Many Solutions

2. Zero Solutions

3. One Solution ( x = 6 )

Step-by-step explanation:

1.

12x + 8 = 2( 6x + 4 )

12x + 8 = 12x + 8

2.

2( 2x + 1 ) = 4x + 3

4x + 2 = 4x + 3

2 = 3

3.

4( x + 1 ) = 3x + 10

4x + 4 = 3x + 10

x + 4 = 10

x = 6

Hopefully this helps!

Brainliest please?

8 0

3 years ago

What is the volume of this pyramid? 945 cm³ 1260 cm³ 1890 cm³ 2520 cm³ A pyramid with a right triangular base. The right triangu

notsponge [240]

Answer:

The volume of the pyramid is $1,260\ cm^{3}$

Step-by-step explanation:

we know that

The volume of the triangular pyramid is equal to

$V=\frac{1}{3}BH$

where

B is the area of the triangular base

H is the height of the pyramid

step 1

Find the area of the base B

$B=\frac{1}{2}bh$

we have

$b=14\ cm$

$h=18\ cm$

substitute

$B=\frac{1}{2}(14)(18)=126\ cm^{2}$

step 2

Find the volume

we have

$B=126\ cm^{2}$

$H=30\ cm$

substitute

$V=\frac{1}{3}BH$

$V=\frac{1}{3}(126)(30)=1,260\ cm^{3}$

5 0

3 years ago

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in sound and harmonics, the frequency of a vibrating string varies inversely to its length. A guitar string 20 inches long vibra

zmey [24]

20 inches is 400
10 inches is 200
5 iches is 100

So 20+10+5=35
Which means 400+200+100= 700

So the frequency of a 35 inch string is 700 cycles per second

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3 years ago

A line connects points A and B ( -5,5 and -5,-3) as shown below. If a third point, C, is plotted six units to the right of point

Strike441 [17]

1,5 is the answer my guy!

8 0

3 years ago

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