Identify the property illustrated by the statement.9 + (-9) = 0
A. Addition property
B. Additive identity
C. Multiplicative identity
D. Inverse property of addition
Answer: D
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Solve the given applied problems involving variation.The distance to the horizon varies directly as the square root of the height above ground level of the observer. If a person can see 6 miles from a height of 25 feet, how far can a person see from a height of 121 feet?
A. 13.2 miles B. 13.5 miles C. 12.1 miles D. 14.4 miles
Find the y-intercepts and any x-intercepts.f(x) = x2 - 6
A. y-intercept (0, -6), x-intercepts (0, 
) and (0, -
)
B. y-intercept (0, -6), x-intercepts (
, 0) and (-
, 0)
C. y-intercept (0, 6), x-intercepts (
, 0) and (-
, 0)
D. y-intercept (0, -6), x-intercept (
, 0)
Rationalize the denominator and simplify. 
A. 
B. 
C. 
D. 
Find the center of the ellipse. 9(x + 1)2 + 16(y + 3)2 = 144
A. (1, 3) B. (-3, -1) C. (-1, -3) D. (9, 16)