Classify the triangle as acute, obtuse, right, scalene, isosceles, or equilateral. State all that apply.
A. obtuse, scalene
B. obtuse
C. acute, scalene
D. scalene
Answer: A
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Solve the compound inequality. Express the solution using interval notation. Graph the solution set.x ? 5 and x ? -1
A. (-1, 5)
B. [-1, 5]
C. (-?, -1] ? [5, ?)
D. ?
Solve the problem.To find the distance AB across a river, a distance BC of 995 m is laid off on one side of the river. It is found that B = 105.3° and Find AB. Round to the nearest meter.
A. 315 m B. 381 m C. 378 m D. 312 m
Multiply the polynomials using the special product formulas. Express the answer as a single polynomial in standard form.(x + 12)2
A. x + 144 B. 144x2 + 24x + 144 C. x2 + 144 D. x2 + 24x + 144
Evaluate the following expression. ? cos2 ? - sin2 ? ?
A. 1 + 2 sin2 ? B. 1 + 2 cos2 ? C. 2 cos2 ? - 1 D. 2 sin2 ? - 1 E. 1 - 2 cos2 ?