Find the sum of the first n terms of the following arithmetic sequence:Second term is 11, third term is 20; n = 19
A. 1,623
B. 1,577
C. 1,489
D. 1,516
Answer: B
Mathematics
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Can the following be the lengths of the sides of a right triangle?7, 20, 41
A. Yes B. No
Mathematics
Factor the GCF from the polynomial.24y2 - 6y
A. 6(4y2 + y) B. 6(4y2 - y) C. 6y(4y - 1) D. y(24y - 6)
Mathematics
Find the derivative.
A. 
B. 
C. 
D. 
Mathematics
Express the exercise as a system of linear equations, then find the solution. Use a calculator where appropriate.Doreen and Irena plan to leave their houses at the same time, roller blade towards each other, and meet for lunch after 2 hours on the road. Doreen can maintain a speed of 7.7 miles per hour, which is 70% of Irena's speed. If they meet exactly as planned, what is the distance between their houses?
A. 15.4 mi B. 26.18 mi C. 22 mi D. 37.4 mi
Mathematics