Determine whether the given solution is correct. If it is not, find the solution.Is 13 the solution for -7x + 8 + 5x = -3x + 13?

A. No; x = -8
B. No; x = -13
C. Yes
D. No; x = 5


Answer: D

Mathematics

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Solve the problem. Unless stated otherwise, assume that the projectile flight is ideal, that the launch angle is measured from the horizontal, and that the projectile is launched from the origin over a horizontal surfaceA fan in the bleachers at Wrigley Field throws an opposing player's home run baseball back onto the playing field. Assume that the fan is 30 feet above the field and that the ball is launched at an angle of 27°. When will the ball hit the ground if its initial speed is 22 ft/sec? Round your answer to the nearest tenth.

A. 3.7 sec B. 1.1 sec C. 2.0 sec D. 1.7 sec

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Find the unknown length in the right triangle. Give an exact answer.

A. b = 
B. b = 2
C. b = 
D. b = 2

Mathematics

Solve the problem. Express the answer in scientific notation to two decimals.Assume that the volume of the earth is 5 × 1014 cubic meters and the volume of a bacterium is  cubic meters. If the earth could be filled with bacteria, how many would it contain?

A. 2.0 × 1030 bacteria B. 5.0 × 10-31 bacteria C. 2.0 × 10-30 bacteria D. 5.0 × 1031 bacteria

Mathematics

Identify the like terms in the algebraic expression. 18p + 3 - 4q + 2 - 8p

A. 18p and 8p B. 18p, -8p and -4q; 3 and 2 C. 18p and -8p; 3 and 2 D. 18p, -8p and -4q

Mathematics