Solve for the variable.x + 
= - 
A. - 
B. - 
C. - 
D. - 
Answer: D
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The base of a ramp sits on the ground. Its slope is 0.4 feet per foot. It extends to the top of the front steps of a building 20 horizontal feet away. ? A: How high is the ramp 1 horizontal foot toward the building from the base of the ramp? ? B: How high is the top of the steps relative to the ground?
What will be an ideal response?
Solve the equation. Round to the nearest tenth, if necessary.If an object is thrown upward from the ground with an initial velocity of 64 ft/sec, its height after t sec is given by h = 64t - 16t2. Find the number of seconds before the object hits the ground.
A. 32 sec B. 4 sec C. 2 sec D. 48 sec
Matrix A is given. Find appropriate identity matrices Im and In such that ImA = A and AIn = A.A = 
A. Im = 
, In = 
B. Im = 
, In = 
C. Im = 
, In = 
D. Im =
, In = 
Solve the polynomial inequality.(x + 10)(x + 4)(x - 1) > 0
A. (1, ?) B. (-?, -4) C. (-?, -10) ? (-4, 1) D. (-10, -4) ? (1, ?)