Simplify.(7 + 8)2
A. 71
B. 225
C. 113
D. 57
Answer: B
Mathematics
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Convert the given polar coordinates of the point to rectangular coordinates.
A. 
B. 
C. 
D. 
Mathematics
Factor the expression. Express your answer so that only positive exponents occur. 9x2/7 - 10x-6/7
A. x-6/7(9x8/7 - 10x) B. x2/7(9x8/7 - 10x4/5) C. x1/3(9 - 10x4/5) D. x-6/7(9x8/7 - 10)
Mathematics
Solve the problem.A rectangular patio has dimensions 10 feet by 15 feet. The patio is surrounded by a border with a uniform width of 4 feet. Find the area of the border.
A. 136 ft2 B. 264 ft2 C. 166 ft2 D. 116 ft2
Mathematics
Write the system of linear equations represented by the augmented matrix. Use x, y, z, and, if necessary, w for the variables.
A.
| 6x - 5y + 3z | = | -2 |
| 2x + 7z | = | -4 |
| 4x + 2y | = | -2 |
B.
| 6x + 5y + 3z | = | -2 |
| 2x + 7z | = | 4 |
| 4x + 2y | = | 2 |
C.
| 6x + 5y + 3z | = | -2 |
| 2x + y + 7z | = | 4 |
| 4x + 2y + z | = | 2 |
D.
| 6x + 5y + 3z | = | -2 |
| 2x + 7z | = | 4 |
| 4x + 2z | = | 2 |
Mathematics