Solve using Cramer's rule, if possible. If it is not possible, state whether the system is inconsistent or has infinitely many solutions.
A. (8, 2, 8)
B. (4, 8, 4)
C. (7, -4, -8)
D. (7, 4, 8)
Answer: D
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Which of the following is not true? ?
A. ?All parallelograms are rectangles. B. ?All rhombuses are parallelograms. C. ?All rectangles are parallelograms. D. ?All trapezoids are quadrilaterals. E. ?All squares are rectangles. F. ?All squares are rhombuses.
Use a graph to find an approximate solution to the equation. Round to the nearest thousandth.4e8x+5 = 3
A. -0.661 B. -1.721 C. -1.649 D. 0.399
Use a calculator to approximate the square root to three decimal places.
A. 2.236 B. 2.241 C. 5.000 D. 2.233
At one high school, students can run the 100-yard dash in an average of 15.2 seconds with a standard deviation of 0.9 seconds. The times are very closely approximated by a normal curve. Find the percent of times that are:Between 14.3 and 16.1 seconds
A. 47.5% B. 50% C. 68% D. 34%