Find the variance of the set of sample data.
86, 97, 80, 57, 94, 78
a. 206
b. 83
c. 14.35
d. 492
e. 82
a. 206
Mathematics
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Evaluate the polynomial.2x2 - y2 + 2xy for x = -3 and y = -6
A. -90 B. 18 C. 90 D. -54
Mathematics
Use graphical methods to find all real solutions to the following equation. Express solutions rounded to the nearest hundredth.0.37x3 - 5.72x2 + 5.23x + 8.25 = 0
A. {0.81, -1.91, 14.36} B. {-0.82, 8.25, 1.91} C. {-0.81, 1.91, 14.37} D. {0.82, -8.25, -1.91}
Mathematics
The parking accommodates 130,000 cars. What area does it occupy if one car occupies about 7 square meters?
a. 1 square mile b. 1 square kilometer c. 13,000,000,000 square feet d. 13,000,000 square kilometers
Mathematics
Solve the equation.
= 
+ 4
A. {24}
B. {32}
C. 
D. {48}
Mathematics