Solve the system by addition.x + 7y = -21-3x + 8y = -24
A. {(3, 0)}
B. {(0, -3)}
C. {(1, -4)}
D. ?
Answer: B
Mathematics
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Factor completely.u2 - 3uv - 54v2 = (u + 6v)( 
)
A. u - 9v B. u + 9v2 C. u + 9v D. u - 9
Mathematics
Use the properties of parallel lines to solve the problem.In the figure, 
. m?BAE = 37°. Given this information, find the measures of as many other angles as possible. 
A. m?CDE = 37° B. m?CDE = 37° , m?ABE = m?DCE = 53° C. m?CDE = m?ABE = m?DCE = 37° D. m?CDE = 37° , m?ABD = 143°
Mathematics
Determine the most appropriate metric unit to go in the blank. Choose from km, m, cm, mm, L, ml, kg, g, and mg.The carton contained 480 
of juice.
A. g B. L C. mg D. ml
Mathematics
Simplify the expression. Write the result using positive exponents only.
A. 
B. 
C. y10
D. 
Mathematics