-2in = the equals sign has a slash through it 0
Answer:
- 1.25 ( approx )
Step-by-step explanation:
Given,
Total tickets = 1172,
In which every ticket costs $ 2, also, three prizes will be awarded 1 for $ 500, 1 for $250 and 1 for $125.
Thus, we can make a table that represents the given situation,
Number of tickets 1 1 1 1169
Probability of ticket 1/1172 1/1172 1/1172 1169/1172
Price of ticket $ 500 $ 250 $ 125 - $ 2
( Note : Negative sign shows the loss, i.e. if we could not get any price then we have a loss of $ 2 )
Thus, the expected value of a ticket
Answer:
Step-by-step explanation:
- Use ratios to solve for x. Corresponding sides have same ratio.
Q1
- (x + 5)/30 = (36 - 20)/20
- (x + 5)/30 = 16/20 = 4/5
- 5(x + 5) = 4(30)
- 5x + 25 = 120
- 5x = 95
- x = 19
Q2
- (5x - 2)/(3x + 1) = 39/26
- (5x - 2)/(3x + 1) = 3/2
- 2(5x - 2) = 3(3x + 1)
- 10x - 4 = 9x + 3
- 10x - 9x = 3 + 4
- x = 7
TS = 3x + 1 = 3(7) + 1 = 22
Answer:
9
Step-by-step explanation:
x² − 36 = 5x
x² − 5x − 36 = 0
(x − 9) (x + 4) = 0
x = 9 or -4
Least-squares regression is used to find the equation of best fit of a linear model
The equation of the least-squares regression line for predicting GPA from the number of absences is
The given parameters are:
The equation of the least-squares regression line is represented as:
Where:
So, we have:
Substitute values for a and b in
So, we have:
Approximate
Hence, the equation of the least-squares regression line for predicting GPA from the number of absences is
Read more about least-squares regression at:
brainly.com/question/2141008