Combine like terms whenever possible. Write the result with descending powers.9x8 + 6x4 - 7x8
A. Cannot be simplified
B. 8x20
C. 8x4
D. 2x8 + 6x4
Answer: D
Mathematics
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Multiply.(2x + 0.3)(2x - 0.3)
A. 4x2 - 0.09 B. 4x2 - 0.6 C. 4x2 - 0.9 D. 4x2 - 1.2x- 0.09
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Solve the problem.A jet plane traveling at a constant speed goes 1200 mi with the wind, then turns around and travels for 1000 mi against the wind. If the speed of the wind is 50 mph and the total flight took 4 hr, find the speed of the plane.
A. 525 mph B. 605 mph C. 550 mph D. 435 mph
Mathematics
Determine the number that should be added to complete the square of the expression. Then factor the expression.x2 - 8x
A. 16; (x + 4)2 B. 16; (x - 4)2 C. 16; (x - 4)(x + 4) D. prime
Mathematics