Combine like terms whenever possible.4y6 - 9y4 + 2y6 + 6y4
A. 2y6 - 3y4
B. 6y6 - 3y4
C. 12y6 - 6y4
D. 6y6 - 15y4
Answer: B
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Solve the problem.An asteroid from deep space is sighted from the earth moving on a parabolic path with the earth at the focus. When the line from the earth to the asteroid first makes an angle of 90° with the axis of the parabola, the asteroid is measured to be 60 million miles away. How close will the asteroid come to the earth? Treat the earth as a point.
A. 6 million miles B. 3 million miles C. 9 million miles D. 30 million miles
Solve for the variable.-8.7 + 3x - 6.9 + 2x - 2.8 = 5.3 + 6x + 1.7
A. x = -11.4 B. x = 11.4 C. x = -25.4 D. x = 25.4
Determine whether the relation is a function.
A. Not a function B. A function
Solve the problem. Express any improper fraction as a whole or mixed number.Martha can rake the leaves in her yard in 6 hours. Her brother can do the job in 7 hours. How long will it take them to do the job working together?
A. 
hr
B. 3
hr
C. 42 hr
D. 
hr