Solve the equation for y.2x - 9y = 7
A. y = 
x + 
B. y = 
x - 
C. y = 
x + 
D. y = 2x - 7
Answer: B
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The Richter scale converts seismographic readings into numbers for measuring the magnitude of an earthquake according to this function M(x) = log 
, where x0 = 10-3.What is the magnitude of an earthquake whose seismographic reading is 7.6 millimeters at a distance of 100 kilometers from its epicenter?Round the answer to four decimal places.
A. 3.8808 B. 0.20281 C. 2.0281 D. 0.38808
Decide whether or not the functions are inverses of each other.f(x) = 
, g(x) = 
A. No B. Yes
Find the open interval(s) where the function is changing as requested.Decreasing; y = x4/5 + x9/5
A. 
B. (-?, 0), 
C. 
D. 
, (0, ?)
Solve the problem.You brake your car from a speed of 55 mph, and in doing so, your car's speed decreases by 11 mph every second. The table shows braking data that represent your car's speed versus the amount of time elapsed from the moment that you applied the brake.
Do the data represent a linear function?
A. Yes B. No