Provide an appropriate response.A student is trying to solve the equation (x + 2)(x - 7) = 9. The student has set x + 2 = 9 and x - 7 = 9 and found that two solutions x = 7, x = 16. The student checks her results by plugging in her solutions into the original equation and finds that they do not work. How would you advise her?
What will be an ideal response?
The equation needs to be set to zero in order to use the zero-factor theorem.
Mathematics
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Solve the absolute value equation.
= 
A. x = 
B. x = - 
, 
C. x = - 
, 
D. no solution
Mathematics
Graph the pair of parametric equations with the aid of a graphing calculator.x = 4(t - sin t), y= 4(1 - cos t), 0 ? t ? 4? 
A. 
B. 
C. 
D. 
Mathematics
Rewrite the following number in scientific notation.28.45 × 105
What will be an ideal response?
Mathematics
Solve the problem. Round to the nearest cent.Central Airlines offers a trade discount series of 30/25/5 for frequent flyers. If a round-trip airline ticket is $697, use the single discount equivalent to calculate the trade discount of a round-trip ticket.
A. $349.37 B. $278.80 C. $347.63 D. $418.20
Mathematics