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Mars2501 [29]
3 years ago
15

Fiona and her friends are playing a game by guessing where a coin will land when it is randomly dropped inside the square shown

below. Fiona guesses that the coin is likely to land in the blue area.
Which explains whether or not Fiona is correct and why ?


A.) Fiona is correct because there are blue areas in the square .

B.) Fiona is correct because more than half of the square is blue .

C.) Fiona is not correct because the coin will definietly land in the white area .

D.) Fiona is not correct because a larger part of the square is white
Mathematics
1 answer:
Butoxors [25]3 years ago
8 0

i'm 85% certain the answer is C. Fiona is not correct because the coin will definitely land in the white area .

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Use Cramer's rule to find the solution to the following system of linear equations.
slavikrds [6]

Answer:

x = 53

y = 30

Step-by-step explanation:

Step(I):-

Given equations are

x -2y =-7 ...(I)

5x-9y =-5 ..(ii)

The matrix form  AX = B

                    \left[\begin{array}{ccc}1&-2\\ 5  & -9\\\end{array}\right] \left[\begin{array}{ccc}x\\y\\\end{array}\right] = \left[\begin{array}{ccc}-7\\-5\\\end{array}\right]

The determinant

= \left|\begin{array}{ccc}1&-2\\5&-9\\\end{array}\right| = -9+10 =1

By using Cramer's Rule

Δ₁ =      \left[\begin{array}{ccc}-7&-2\\\\-5&-9\end{array}\right]



The determinant is     Δ₁ = -9 X -7 - (10 ) = 53

x = Δ₁ / Δ

x = 53

The determinant

Δ₂ =



Δ₂ = -5 +35

     

 

y = Δ₂/Δ =  30

     

5 0
3 years ago
Read 2 more answers
A rectangle has a length of the fifth root of 16 inches and a width of 2 to the 1 over 5 power inches. Find the area of the rect
dybincka [34]
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3 years ago
please can someone explain to me how this is done the answer is 85 but how to figure it out I am giving away 10 points the quest
shtirl [24]

Answer:

Step-by-step explanation:

A = \frac{hb}{2}

h = 10 cm , b = 17 cm

A = 10 × 17 ÷ 2 = 85 cm²

3 0
3 years ago
An individual who has automobile insurance from a certain company is randomly selected. Let y be the number of moving violations
Hoochie [10]

Answer:

a) E(Y)= \sum_{i=1}^n Y_i P(Y_i)

And replacing we got:    

E(Y) = 0*0.45 +1*0.2 +2*0.3 +3*0.05= 0.95

b) E(80Y^2) =80[ 0^2*0.45 +1^2*0.2 +2^2*0.3 +3^2*0.05]= 148

Step-by-step explanation:

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

Part a

We have the following distribution function:

Y        0         1         2       3

P(Y)  0.45    0.2    0.3   0.05

And we can calculate the expected value with the following formula:

E(Y)= \sum_{i=1}^n Y_i P(Y_i)

And replacing we got:    

E(Y) = 0*0.45 +1*0.2 +2*0.3 +3*0.05= 0.95

Part b

For this case the new expected value would be given by:

E(80Y^2)= \sum_{i=1}^n 80Y^2_i P(Y_i)

And replacing we got

E(80Y^2) =80[ 0^2*0.45 +1^2*0.2 +2^2*0.3 +3^2*0.05]= 148

5 0
3 years ago
How much money does Alex have more than Emily? Alex has $68.00 and Emily has $-94.00
liraira [26]

Answer:

162

Step-by-step explanation:

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4 years ago
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