Solve.
= 
A. 30
B.
C.
D.
Answer: B
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Solve the system of equations using substitution.
A. x = -5, y = -1; x = 8, y =
or (-5, -1),
B. x = 5, y = 1; x = -8, y = -
or (5, 1),
C. x = 5, y = 1; x = - , y = -8
or (5, 1),
D. x = -5, y = -1; x = , y = 8
or (-5, -1),
Solve the problem.If a ladder is carried horizontally around a corner from a hall A feet wide into a hall B feet wide, the length of the longest ladder that can turn the corner can be determined by first solving the equation Solve this equation for ?.
A. ? = tan-1
B. ? = tan-1
C. ? = tan-1
D. ? = tan-1
Give the genus of the object. If the object has a genus larger than 5, write "larger than 5."A kitchen chair
A. genus 3 B. genus 4 C. larger than 5 D. genus 5
Establish the identity.cot(x + y) cot(x - y) =
What will be an ideal response?