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Angelina_Jolie [31]
3 years ago
12

A group of three people are selected at random, what is the probability that all the three people have different birthdays.

Mathematics
1 answer:
Tanya [424]3 years ago
5 0

Answer:

1:1

Step-by-step explanation:

this is because they are selected at random 3/3=1

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Y=2x+1 x+y=7 pls help meeeeeeeee
Gala2k [10]

Answer:

y=2,\:x=\frac{5}{2}

Step-by-step explanation:

\begin{bmatrix}x+1\cdot \:x+y=7\\ y=2\end{bmatrix}

x+1· x+2=7

Simplify x+1· x+2:    2x+2x+1· x+2

Add similar elements: x+1· x=2x=2x+2

2x+2=7[ 2x+2=7 ]

Isolate x for 2x+2=7:    x=52 2x+2=7

Subtract 2 from both sides

2x+2−2=7−2

Simplify

2x=5

Divide both sides by 2

2x2 =52 Simplify

5 0
3 years ago
Read 2 more answers
Helen goes into a shop.
Tomtit [17]

Answer:

yes

Step-by-step explanation:

2*24.50=49 (two shirts)

18.90 (pair of shorts)

49+18.90=67.90

she can spend 70, means she can buy all of those and she still has 2.10  

5 0
3 years ago
Find the height of a cylinder with a surface area of 108 pi square meters. The radius of the cylinder is twice the height.
myrzilka [38]
Let
x---------> radius of the cylinder
y---------> the height of the cylinder

we know that
x=2y
[surface area of cylinder]=2*[pi*r²]+2*pi*r*h
surface area=108*pi m²
r=x
h=y
x=2y
108*pi=2*[pi*(2y)²]+2*pi*(2y)*y
108*pi=8*pi*y²+4*pi*y²
108*pi=12*pi*y²
y²=108/12
y²=9----------> y=√9--------> y=3 m
x=2y-------> x=2*3-----> x=6 m

the answer is
the height of the cylinder is 3 m
4 0
3 years ago
Simplify the expression. Show all of your work. 16 plus 4 cubed times 2 divided by 16
frozen [14]

Answer:

528

Step-by-step explanation:

Question: 16 + 4^{3} * 2 ÷ 16

Work:

4^{3} = 64

2/16 = 0.125

64/0.125 = 512

512 + 16 = 528

4 0
3 years ago
PLEASE ANSWER ASAP !!!!
klemol [59]
At h=1 y=-2 so -2 hope it helps!
3 0
3 years ago
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