Solve.The equation D = 
n(n - 3) gives the number of diagonals D for a polygon with n sides.Find the number of diagonals for a polygon that has 10 sides.
A. 65 diagonals
B. 35 diagonals
C. 70 diagonals
D. 7 diagonals
Answer: B
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Find the sum of the n terms of the indicated arithmetic sequence.-1, - 
, -2, . . . ; n = 10
A. -32.5 B. -37.5 C. 17.5 D. -35
Solve the problem.An isosceles triangular plate is submerged vertically in seawater, with its base on the bottom. The base is 
long, and the height of the triangle is 
. Find the fluid force exerted on one face of the plate if the water level is 
above the base of the triangle. Seawater weighs 
Round your answer to one decimal place if
necessary. A. 1194.7 lb B. 1792 lb C. 3584 lb D. 341.3 lb
Find the indicated probability.When two balanced dice are rolled, there are 36 possible outcomes. Find the probability that either doubles are rolled or the sum of the dice is 8.
A. 
B. 
C. 
D. 
Graph the inequality.
- 
< 1
A. 
B. 
C. 
D. 