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klio [65]
3 years ago
12

Can you help me please ​

Mathematics
1 answer:
qwelly [4]3 years ago
6 0

Answer:

x = 2

Explanation:

according to BPT theorem,

BD BE

---- = ----

DA EC

6 x+1

--- = ----

4 x

6x = 4x +4 ( cross multiplication)

transposing,

6x -4x=4

2x= 4

x= 2

hence x=2

BE = x+1 =2+1 =3

EC = x =2

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A number from 1-100 is randomly selected. What is the probability that it is a perfect square, given that it is an odd number?
coldgirl [10]
Events:
1 ≤ n ≤ 100
A=x is a perfect square, i.e. x=n^2
B=x is odd, i.e. n is odd
P(A|B)
=P(A∩B)/P(B)   by definition of conditional probability
(reads Probability that the number is a perfect square given that it is odd)

Since there are 10 perfect squares between 1 to 100 (1,4,9,16,25,36,49,64,81,100), out of which 5 are odd {1,9,25,49,81)
So P(A∩B)=5/100
P(B)=probability of odd x  {1,3,5,7,.....95,97,99}
= 50/100=1/2
Therefore 
P(A|B)=(5/100)/(1/2)=1/10

5 0
3 years ago
1. Gloria says the two expressions 2(3x+6) - 9x and 3x4 are equivalent,
scZoUnD [109]

Step-by-step explanation:

Well, Let's find out!

Gloria says,

2(3x+6)-9x=3*4

By using distributive law

6x+12-9x=12

12-3x=12

-3x=12-12

-3x=0

x=0/-3

So she is not correct

5 0
3 years ago
Read 2 more answers
Classify each pair of angels listed below as adjacent or vertical.
Stolb23 [73]

Answer:

ntersecting lines DA and CE.

To find:

Each pair of adjacent angles and vertical angles.

Solution:

Adjacent angles are in the same straight line.

Pair of adjacent angles:

(1) ∠EBD and ∠DBC

(2) ∠DBC and ∠CBA

(3) ∠CBA and ∠ABE

(4) ∠ABE and ∠EBD

Vertical angles are opposite angles in the same vertex.

Pair of vertical angles:

(1) ∠EBD and ∠CBA

(2) ∠DBC and ∠EBA

5 0
3 years ago
20 is 60% of what number
Oxana [17]
33.33? im not sure, but you do a/b=p/100. p is the percent, a is the part of the whole number, b. so the equation would be 20/b=60/100. then you do cross multiplication (60b=2000) then you divide.
3 0
3 years ago
I really need help please someone
Lilit [14]

Step-by-step explanation:

your welcome

....................

3 0
3 years ago
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