A sample of two transistors taken from a local electronics store was examined to determine whether the transistors were defective (d) or nondefective (n). What is an appropriate sample space for this experiment?
a. {dd, dn, nd}
b. {dd, dn, nd, nn}
c. {dd, nn, nd}
d. {(d,d), (n,n)}
b. {dd, dn, nd, nn}
Mathematics
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Solve the system by the substitution method. Be sure to check all proposed solutions.x + 4y = 78y = 6x + 7
A. {(-2, -5)} B. {(1, 13)} C. {(3, 25)} D. {(2, 19)}
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Find the real solutions of the equation.(x2 - 1)1/2 = 12
A. {145, -145}
B. {
}
C. {13}
D. {
, - 
}
Mathematics
Solve the equation.x2 - 7x = 0
A. 7, 0 B. -7, 0 C. 49, 0 D. -7, 1
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Use the calculator graph to find the solution set of the given equation or inequality.-
? x 
A. [-1, 0] B. [-1, ?) C. [-2, -1] D. [-2, ?)
Mathematics