Find the mistake, then find the correct answer.line 1 x2 + 6x = -5line 2 x2 + 6x + 9 = -5 + 9line 3 (x + 3)2 = 4line 4 x + 3 = 
line 5 x + 3 = 2 line 6 x + 3 - 3 = 2 - 3 line 7 x = -1
What will be an ideal response?
| line 4 should be: | x + 3 = ± |
line 6 should be: x + 3 - 3 = ±2 - 3
line 7 should be: x = -1, -5
Mathematics
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The scores on a 30-point multiple-choice exam are given in the following frequency table:
What is the the mean score on the exam?
A. 25 B. 25.5 C. 26 D. 26.5
Mathematics
Let U = {q, r, s, t, u, v, w, x, y, z}, A = {q, s, u, w, y}, B = {q, s, y, z}, and C = {v, w, x, y, z}. List the elements in the following set.A ? 
A. {t, v, x} B. {u, w} C. {q, s, t, u, v, w, x, y} D. {r, s, t, u, v, w, x, z}
Mathematics
Expand the quotient by partial fractions.
A. 
- 
B. 
+ 
C. 
+ 
D. 
- 
Mathematics
Rectangular coordinates of a point are given. Use a graphing utility in radian mode to find polar coordinates of the point.(6, 8) Express ? to three decimal places.
A. (10, 0.927) B. (14, 0.644) C. (10, 0.848) D. (10, 0.644)
Mathematics