Simplify each side of the equation, if possible. Then solve the equation.-2a + 5 + 3a = 10 - 20
A. -15
B. 15
C. 35
D. -35
Answer: A
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Multiply using Napier's rods.45 × 326
A. 14,625 B. 14,670 C. 14,715 D. 14,996
Determine whether the equation represents direct, inverse, joint, or combined variation.y = 
A. Direct B. Combined C. Inverse D. Joint
Give the center and radius of the circle. Then sketch its graph.(x + 3)2 + (y + 2)2 = 9
A. center (- 3, - 2), r = 3
B. center (- 3, 2), r = 3
C. center (3, 2), r = 3
D. center (3, - 2), r = 3
Solve the problem.If there are x teams in a sports league and all the teams play each other twice, a total of N(x) games are played, where N(x) = x2 - x. A soccer league has 6 teams, each of which plays the others twice. If the league pays $48 per game for the field and officials, how much will it cost to play the entire schedule?
A. $1536 B. $1728 C. $2016 D. $1440