Solve the number problem by finding the value of the unknown number.The product of a number and -5 yields five times the sum of that number and 14.
A. -5
B. 7
C. 5
D. -7
Answer: D
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Solve.The number G of gears a machine can make varies directly as the time T it operates. If it can make 7263 gears in 18 hours, how many gears can it make in 15 hours? Round to the nearest whole number if necessary.
A. 0 gears B. 404 gears C. 7296 gears D. 6053 gears
Verify the identity.sin(? - ?) cos(? + ?) = sin ? cos ? - sin ? cos ?
What will be an ideal response?
Solve the problem.If an object is thrown upward with an initial velocity of 64 ft/sec, its height after t sec is given by 
Find the number of seconds before the object hits the ground.
A. 2 sec B. 32 sec C. 48 sec D. 4 sec
Find the critical point(s) of the function. Then use the second derivative test to classify the nature of each point, if possible. Finally, determine the relative extrema of the function.
?
?
A. 
; relative maximum value: 
B. 
and ; relative maximum value: 
; relative minimum value: 
C. 
; saddle point: 
D. 
and ; saddle point: ; relative minimum value: 
E. there are no critical points