Solve the system by the addition method.2x2 + y2 = 173x2 - 2y2 = -6
A. {(1, 3), (-1, -3)}
B. {(2, 3), (2, -3), (-2, 3), (-2, -3)}
C. {(2, -3), (-2, 3)}
D. {(1, 3), (1, -3), (-1, 3), (-1, -3)}
Answer: B
Mathematics
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Simplify the expression. Use the distributive property to remove any parentheses.-5(r + 7)
A. -5r - 35 B. r - 35 C. -5r - 7 D. -5r + 35
Mathematics
Use Method II to simplify the complex rational expression.
A. 
B. 
C. 
D. 
Mathematics
Solve the right triangle using the information given. Round answers to two decimal places, if necessary. 
a = 6, b = 7; Find c, A, and B.
A. c = 3.61 A = 40.6° B = 49.4° B. c = 9.22 A = 41.6° B = 48.4° C. c = 3.61 A = 41.6° B = 48.4° D. c = 9.22 A = 40.6° B = 49.4°
Mathematics
Solve using both the addition and multiplication properties of equality.
y - 60 = -48
A. y = 1 B. y = 8 C. y = 72 D. y = -8
Mathematics