Solve the system by substitution. -4x + 8y = 56 x + 7y = 49
A. No solution
B. (0, 7)
C. (1, 6)
D. (-7, 0)
Answer: B
Mathematics
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Find the direction angles of the vector. Round to the nearest degree, if necessary.v = -2i + 3j + 4k
A. ? = 113°, ? = 55°, ? = 40° B. ? = 115°, ? = 51°, ? = 33° C. ? = 119°, ? = 43°, ? = 14° D. ? = 112°, ? = 56°, ? = 42°
Mathematics
Use the square root property to solve the equation.(3x + 2)2 = 10
A. 
B. 
C. -4 , 
D. 
Mathematics
Subtract.(28x + 16xy - 21y) - (13x - 6xy - 26y)
A. 12x - 15xy + 47 B. 15x - 22xy - 47y C. 42xy D. 15x + 22xy + 5y
Mathematics
Classify the statement as true or false. Consult the following list as needed. N = the set of natural numbers W = the set of whole numbers Z = the set of integers Q = the set of rational numbers H = the set of irrational numbers R = the set of real numbers
? Q
A. True B. False
Mathematics