Solve the problem.A contractor finds that it takes Julie 9 hours to construct a wall of a certain size. It takes Leann 7 hours to construct the same wall. How long would it take if they worked together?
A. 3
hours
B. 16 hours
C. 
hours
D. 1 hour
Answer: A
Mathematics
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Translate the problem to a system of equations, then solve using Cramer's Rule.During the 2001-2002 Little League season, the Tigers played 51 games. They won 19 more games than they lost. How many games did they win that season?
A. 37 games B. 35 games C. 16 games D. 32 games
Mathematics
Complete the equation so the result is an identity. sin x = (
)(cos x)
A. cot x B. tan x C. csc x D. sec x
Mathematics
Factor the polynomial by removing the common monomial factor. 42x8y7 + 30x2y5 + 36x6y2
A. 6(7x8y7 + 5x2y5 + 6x6y2) B. 6x2(7x6y7 + 5y5 + 6x4y2) C. 6x2y2(7x6y5 + 5y3 + 6x4) D. x2y2(42x6y5 + 30y3 + 36x4)
Mathematics
Shade the Venn diagram to represent the set.A ? (B ? C')
A. 
B. 
Mathematics