Fill in the blank with one of the words or phrases listed below.
The vertical number line in the rectangular coordinate system is called the 
.
A. y-axis
B. x-intercept
C. y-intercept
D. x-axis
Answer: A
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Verify that the equation is an identity.tan
= -cot x
What will be an ideal response?
A college sent a survey to a sample of juniors. Of the 512 students surveyed, 279 live on campus, of whom 110 have a GPA of 2.5 or greater. The other 233 juniors live off-campus, of whom 85 have a GPA of 2.5 or greater. What is the probability that a survey participant chosen at random lives on campus and has a GPA of 2.5 or greater?
a. 
b. 
c. 
d. 
Solve the problem using the quadratic formula.For a car traveling at x mph, stopping distance is estimated by the formula d = 
x2 + 
x. Find a (maximum) safe speed for a stopping distance of 660 ft. Round your answer to the nearest mph.
A. 71 mph B. 66 mph C. 74 mph D. 62 mph
Find a polynomial that represents the area of the figure.
A. 21s7
B. 21s12
C. 
s12
D. 
s7