Rephrase the statement in the requested symbolic form.contrapositive of a ? ~(b ? c)
A. (b ? c) ? ~a
B. ~a ? (b ? c)
C. ~a ? ~(b ? c)
D. ~(b ? c) ? a
Answer: A
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Add the polynomials.(6y5 + 2y3 + 8y) + (2y5 + 3y3 - 6y)
A. 15y9 B. 8y + 5y5 + 2y3 C. 8y5 + 5y3 + 2y D. 10y5 + 9y3 - 4y
Find any values of the variable that make the expression undefined.
A. 7 B. 0 C. -7 D. None
Solve the problem using Snell's Law: 
= 
.The index of refraction of light passing from air into a second medium is 1.40. If the angle of incidence is 
what is the angle of refraction (to two decimal places)?
A. 42.48° B. 45.13° C. 44.87° D. 47.52°
Solve the system of equations using substitution.
A. x = -3, y = -1; x = -1, y = -3; x = -3, y = 1; x = -1, y = 3 or (-3, -1), (-1, -3), (-3, 1), (-1, 3) B. x = 3, y = 1; x = 1, y = 3; x = 3, y = -1; x = 1, y = -3 or (3, 1), (1, 3), (3, -1), (1, -3) C. x = 3, y = -3; x = -3, y = -1; x = 1, y = 3; x = -1, y = -3 or (3, -3), (-3, -1), (1, 3), (-1, -3) D. x = 3, y = 1; x = -3, y = -1; x = 3, y = -1; x = -3, y = 1 or (3, 1), (-3, -1), (3, -1), (-3, 1)