Use the commutative and/or associative laws to rewrite the given expression. Label each step with a reason.(x + 9) + 9 as 18 + x
What will be an ideal response?
| (x + 9) + 9 = x + (9 + 9) | Using the associative law |
= 18 + x Using the commutative law
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Find the volume of the indicated region.The region bounded by the coordinate planes and the planes 
, 
A. 36 B. 72 C. 54 D. 108
Use regression to find a quadratic function that best fits the data. Give results to the nearest hundredth.
A. f(x) = -0.03 + 3.78x - 6.74 B. f(x) = 1.40x2 + 27.15x + 14.44 C. f(x) = -1.40x2 + 27.15x - 14.44 D. f(x) = 5.66x2 - 39.888x + 99.29
Which of the following physical situations would best be modeled by the graph?
A. The length y of a shadow cast by a tree between sunrise and noon, where t is the angle of elevation of the sun.
B. The length y of a shadow cast by a horizontal flagpole on a vertical wall between sunrise and noon, where t is the angle shown.
C. The number of hours y of sunlight during month t, where t = 1 corresponds to January.
D. The monthly average ocean temperature y in degrees Fahrenheit during month t, where t = 1 corresponds to January.
Solve the problem.An airplane is cruising at an altitude of 42,240 ft. What is the plane's altitude in miles?
A. 9 mi B. 7 mi C. 16 mi D. 8 mi