If possible, evaluate the expression at the given value of the variable.
, x = -4
A. 
B. - 
C. - 
D. Undefined
Answer: C
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Two cars start from the same place traveling in opposite directions. One car travels 6 miles per hour faster than the other car. Find their speeds if after 8 hours they are 768 miles apart.
A. 44 miles?per?hour?and?50?miles?per?hour B. 46 miles?per?hour?and?52?miles?per?hour C. 45 miles?per?hour?and?51?miles?per?hour D. 43 miles?per?hour?and?49?miles?per?hour
Find an equation for the circle.Center at (2, -4), radius of length 
A. (x - 2)2 + (y - 4)2 = 
B. (x - 2)2 + (y + 4)2 = 
C. (x + 2)2 - (y + 4)2 = 4
D. (x + 2)2 + (y - 4)2 = 4
Divide. Leave your answer in exponent form. Assume that all variables in any denominator are nonzero.
A. 
B. 
C. 
D. 
The lengths of the sides of a triangle are given. Determine if the triangle is a right triangle. If it is, identify the hypotenuse.3, 4, 5
A. right triangle; 12 B. right triangle; 5 C. right triangle; 13 D. not right triangle