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Karo-lina-s [1.5K]
3 years ago
9

How do we express 25 in exponential form?

Mathematics
2 answers:
34kurt3 years ago
4 0

Answer:

25= 5×5

Step-by-step explanation:

fgiga [73]3 years ago
3 0
You represent it by 5 x 5
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Which is an equation of the line that passes through (2, -5) and (6, 3)?
Tresset [83]

Answer: y = 2x - 9

Step-by-step explanation:

I graphed it and did the work in my head-

6 0
3 years ago
recall that two angles are supplementary if the sum of their measure is 180. find the measures of two supplementary angles if on
aleksklad [387]

Answer:

I don't know if it's correct

but I tried

Step-by-step explanation:

let the angle be x

20+4x+x=180

20+5x=180

5x=160

x=32

5 0
3 years ago
A sample of 100 cars driving on a freeway during a morning commute was drawn, and the number of occupants in each car was record
makkiz [27]

Answer:

E(X)=1*0.74 +2*0.1 +3*0.11+ 4*0.03 +5*0.02=1.49  

Var(X)=E(X^2)-[E(X)]^2 =3.11-(1.49)^2 =0.8899  

Sd(X)=\sqrt{Var(X)}=\sqrt{0.8899}=0.943  

Step-by-step explanation:

For this case we have the following data given:

X      1    2    3    4    5

F     74   10  11    3    2

The total number of values are 100, so then we can find the empirical probability dividing the frequency by 100 and we got the followin distribution:

X          1          2        3         4          5

P(X)     0.74   0.10   0.11    0.03    0.02

Previous concepts

In statistics and probability analysis, the expected value "is calculated by multiplying each of the possible outcomes by the likelihood each outcome will occur and then summing all of those values".  

The variance of a random variable Var(X) is the expected value of the squared deviation from the mean of X, E(X).  

And the standard deviation of a random variable X is just the square root of the variance.  

Solution to the problem

In order to calculate the expected value we can use the following formula:  

E(X)=\sum_{i=1}^n X_i P(X_i)  

And if we use the values obtained we got:  

E(X)=1*0.74 +2*0.1 +3*0.11+ 4*0.03 +5*0.02=1.49  

In order to find the standard deviation we need to find first the second moment, given by :  

E(X^2)=\sum_{i=1}^n X^2_i P(X_i)  

And using the formula we got:  

E(X^2)=1^2 *0.74 +2^2 *0.1 +3^2 *0.11 +4^2 0.03 +5^2 *0.02=3.11  

Then we can find the variance with the following formula:  

Var(X)=E(X^2)-[E(X)]^2 =3.11-(1.49)^2 =0.8899  

And then the standard deviation would be given by:  

Sd(X)=\sqrt{Var(X)}=\sqrt{0.8899}=0.943  

7 0
3 years ago
Find the point B on AC overline such that the ratio of AB to BC is 1:3
Degger [83]

Answer:

Step-by-step explanation:

The xxx-coordinate of BBB is 333 less than the xxx-coordinate of AAA, or 8 - 38−38, minus, 3.

The yyy-coordinate of BBB is 111 greater than the yyy-coordinate of AAA, or -8 + 1−8+1minus, 8, plus, 1.

The coordinates of BBB are (5, -7)(5,−7)left parenthesis, 5, comma, minus, 7, right parenthesis.

answer (5,-7)

pls refer to this answer and pls mark me brainliest as i have been waiting to be brainliest for almost 5 years pls

7 0
3 years ago
Plz help,,,,,,,,,,,,,,,,,,,,
Kay [80]
I believe that the answer would be c . 
7 0
3 years ago
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