Solve.A collection of dimes is arranged in a triangular array with 16 coins in the base row, 15 in the next, 14 in the next, and so forth with 1 dime in the last row. Find the value of the collection.
A. $27.20
B. $13.60
C. $1.36
D. $6.80
Answer: B
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Write the sum without sigma notation and evaluate it.
A. 3 cos ? + 9 cos 2? + 27 cos 3? = -21 B. 3 cos ? + 9 cos 2? + 27 cos 3? = 21 C. 3 cos ? + 27 cos 3? = -30 D. 3 cos ? + 9 cos ? + 27 cos ? = -39
Solve the system graphically. If the system has an infinite number of solutions, use set-builder notation to write the solution set. If the system has no solution, state this.x - y = 4x + y = 10
A. (6, 14) B. (7, 3) C. (3, 7) D. (14, 6)
Perform the indicated operation.(3a + 10c)(3a - 10c)
A. 3a2 - 10c2 B. 9a2 - 100c2 C. 9a2 + 60ac - 100c2 D. 9a2 - 60ac - 100c2
Solve the problem.A person burns 6.6 calories per minute while walking. How many calories will be burned if the person walks for 3 hours?
A. 198 calories B. 1188 calories C. 11,880 calories D. 19.8 calories