Solve the problem.Martha can rake the leaves in her yard in 8 hours. Her brother can do the job in 2 hours. How long will it take them to do the job working together?
A. 
hr
B. 
hr
C. 
hr
D. 
hr
Answer: A
Mathematics
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Solve using the substitution method. 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 = -3x + y = -7
A. (0, 0) B. No solution C. (-3, -7) D. (0, -10)
Mathematics
842 ð 10-3 =
a. 8.42 b. 0.842 c. 84200 d. 84.2 e. 8420
Mathematics
Solve the right triangle.
b = 160, c = 450
A. A = 70.4, B = 19.6, a = 477.6 B. A = 69.2, B = 20.8, a = 420.6 C. A = 69.2, B = 20.8, a = 477.6 D. A = 19.6, B = 70.4, a = 420.6
Mathematics
Express as a product of prime factors.615
A. 3 ? 5 ? 41 B. 15 ? 41 C. 52 ? 41 D. 32 ? 41
Mathematics