Write the phrase as a mathematical expression. Use x to represent the number. Combine like terms if possible.A number multiplied by -2, subtracted from the sum of 18 and four times the number.
A. 2x - 22
B. (18 + 4x) + (-2)x; 18 + 2x
C. (18 + 4x) - (-2)x; 18 + 6x
D. 2x - (18 + 4x); -2x - 18
Answer: C
Mathematics
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Factor using the ac-method.9x4 + 12x2 + 4
A. (9x2 + 2)(x2 + 2) B. (3x2 - 2)(3x2 - 2) C. (3x2 + 1)(3x2 + 4) D. (3x2 + 2)(3x2 + 2)
Mathematics
A system of two linear equations has been solved graphically. Use the graph to find any solutions.
A. No solutions B. (0,0) C. Infinite number of solutions D. (0, 2)
Mathematics
Evaluate the logarithm.log10100
A. 1 B. 2 C. -1 D. -3
Mathematics
Solve the inequality by using the method of your choice. State the solution set in interval notation and graph it.x2 + 12x + 20 ? 0
A. (-?, -10] ? [-2, ?)
| -10? | -2 |
B. (-?, -4] ? [10, ?)
| -4 | 10 |
C. (-?, -2] ? [10, ?)
| -2 | 10 |
D. (-?, 2] ? [10, ?)
| 2? | 10 |
Mathematics