Find the variance of the probability density function to the nearest hundredth.f(x) = 1 - 
; [1, 4]
A. 0.57
B. 0.52
C. 0.61
D. 0.53
Answer: A
Mathematics
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Simplify the algebraic expression.4x + 8x
A. 12x B. -4x C. 12x2 D. 4x
Mathematics
Solve the equation.Find the value of x if y = -20, m = 2 and b = -2 in the formula y = mx + b.
A. x = -36 B. x = 9 C. x = -9 D. x = 36
Mathematics
Plot and interpret the appropriate scatter diagram.The table shows the study times and test scores for a number of students. Draw a scatter plot of score versus time treating time as the independent variable. 
Effect of Study on Test Score
Time (min)
A. Effect of Study on Test Score
| Time (min) |
test scores.
B. Effect of Study on Test Score
| Time (min) |
test scores.
C. Effect of Study on Test Score
| Time (min) |
test scores.
D. Effect of Study on Test Score
| Time (min) |
test scores.
Mathematics
Find the percent using a proportion. Round your answer to the nearest tenth if necessary.What percent of 46 rabbits is 705 rabbits?
A. 1532.6% B. 153.3% C. 0.7% D. 0.1%
Mathematics