Solve the system of equations using matrices.
A. (4, 4)
B. (-2, 7)
C. {(x,y) 
}
D. ?
Answer: D
Mathematics
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Solve the problem.You are considering buying 15 silver coins that look alike, but you have been told that one of the coins is a lightweight counterfeit. How can you determine the lightweight coin in a maximum of three weighings on a balance scale?
What will be an ideal response?
Mathematics
Find the indicated term for the geometric sequence with the first term a1 and common ratio r.Find a2 when a1 = 1728, r = 
A. a2 = - 
B. a2 = 432
C. a2 = 
D. a2 = -432
Mathematics
Find the exact area under the curve between the indicated values of x.y = 
; between x = 1 and x = 4
A. 2
B. 4
C. 
D. 
Mathematics
Combine like terms. 12k + 6(4 - 7k)
A. 5k + 24 B. -30k + 24 C. 54k - 24 D. 30k - 24
Mathematics