Solve.The braking distance D in feet required for a car traveling x miles per hour to stop on dry, level pavement can be approximated by D = 
x2. If the braking distance is 84 feet, estimate the speed of the car. If necessary, round to the nearest mile per hour.
A. 30 mph
B. 8 mph
C. 924 mph
D. 9 mph
Answer: A
Mathematics
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Solve.16x2 + 48x + 27 = 0
A. - 
, - 
B. - 
, 
C. 
, 
D. - 
, - 
Mathematics
Determine if the equation is linear.0 = 2
+ 1
A. Linear B. Not linear
Mathematics
Find the unit vector having the same direction as v.v = -3i - 4j
A. u = - 
i - 
j
B. u = 
i + 
j
C. u = -15i - 20j
D. u = - 
i - 
j
Mathematics
Provide an appropriate response.How many solutions does the equation -3x + 4y = 3 have?
A. 0 B. 1 C. 3 D. An infinite number
Mathematics