Match the inequality with the correct graph or interval notation.x ? 4
A. (-?, 4]
B. [4, ?)
C. (-?, 4)
D. (4, ?)
Answer: B
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Solve.An express and local train leave Grayslake at 3 P.M. and head for Chicago 50 miles away. The express travels twice as fast as the local and arrives 1 hour ahead of the local. Find the speed of each train.
A. Express's rate = 25 mph and local's rate = 12.5 mph. B. Express's rate = 60 mph and local's rate = 30 mph. C. Express's rate = 50 mph and local's rate = 25 mph. D. Cannot be determined with information given.
Determine whether the graph of the equation is symmetric with respect to the x-axis, the y-axis, and/or the origin.y = 5x2 + 3
A. origin B. y-axis C. x-axis D. x-axis, y-axis, origin E. none
Solve the problem.The length of a room is 3 feet more than the width. The room has a floor area of 378 square feet. Find the dimensions of the room.
A. Length: 18 feet; Width: 15 feet B. Length: 24 feet; Width: 21 feet C. Length: 21 feet; Width: 18 feet D. Length: 22 feet; Width: 19 feet
Complete the sentence so the result is an identity. Let x be any real number.1 - = sin2x
A. sec2x B. cos2x C. tan2x D. cot2x