Find the solution to the quadratic equation, if they exist.
2x²+4x+7= 0
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Solve the problem. Round your answer, if appropriate.One airplane is approaching an airport from the north at 140 km/hr. A second airplane approaches from the east at 265 km/hr. Find the rate at which the distance between the planes changes when the southbound plane is 30 km away from the airport and the westbound plane is 21 km from the airport.
A. -534 km/hr B. -133 km/hr C. -400 km/hr D. -267 km/hr
Divide.
A. 42x4 - 70x - 42 B. 6x5 - 70x2 - 42x C. 6x5 - 10x2 - 6x D. 6x4 - 10x - 6
The graph of a function is given. Find the indicated function value.g(-2)
A. 1 B. 2 C. -1 D. -2
Which of the following pairs of variables is most likely to have a spurious correlation?
a. number of dollars earned vs. number of hours worked b. grade earned on a test vs. amount of time spent studying c. average life expectancy vs. number of TVs per home d. gas mileage vs. average car speed on a trip