Evaluate the expression.(-7)2
A. -14
B. -49
C. 14
D. 49
Answer: D
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Reduce:
Joshua paints with watercolors on a sheet of paper 28 inches wide by 16 inches high. He then places this sheet on a mat so that a uniformly wide strip of the mat shows all around the picture. The perimeter of the mat is 112 inches. How wide is the strip of the mat showing around the picture?
 figure 1.png)
(a) 2 inches
(b) 8 inches
(d) 6 inches
(e) 4 inches
Solve using artificial variables.Minimizew = 5x1 + 2x2subject to:x1 + x2 = 10 3x1 + x2 ? 18 x1 + 2x2 ? 12 x1 ? 0, x2 ? 0
A. Minimum is 44 for x1 = 8, x2 = 2 B. Minimum is 41 for x1 = 7, x2 = 3 C. Minimum is 32 for x1 = 4, x2 = 6 D. Minimum is 20 for x1 = 0, x2 = 10
Solve the problem.The following graph shows the private, public and total national school enrollment for students for select years from 1970 through 2000.
i) How is the graph for total school enrollment, T, determined from the graph of the private enrollment, r, and the public enrollment, u?ii) During which 10-year period did the total number of students enrolled increase the least?iii) During which 10-year period did the total number of students enrolled increase the most?
A.
| i) | T is the sum of r and u. |
iii) 1990-2000
B.
| i) | T is the sum of r and u. |
iii) 1970-1980
C.
| i) | T is the difference of r and u. |
iii) 1990-2000
D.
| i) | T is the sum of r and u. |
iii) 1980-1990