Use the formula for the sum of the first n terms of an arithmetic sequence to find the indicated sum.
A. -1267.5
B. -1599
C. -1404
D. -1560
Answer: B
Mathematics
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Use the relationship among the three angles of any triangle to solve the problem.One angle of a triangle is 3 times as large as another. The measure of the third angle is 55° greater than that of the smallest angle. Find the measure of each angle.
A. 35°, 105°, 40° B. 25°, 75°, 80° C. 25°, 75°, 55° D. 30°, 90°, 60°
Mathematics
Provide the proper response.Without graphing, justify why x2 + 9 - 6x - 8y + 32 = 0 is the equation of a parabola.
What will be an ideal response?
Mathematics
Solve.
= 5
A. {-5} B. {5} C. {25} D. {5, -5}
Mathematics
Provide the appropriate response.Find the least positive number divisible by four primes.
A. 16 B. 210 C. 11 D. 30
Mathematics