Which method should be used to solve the system? Explain your answer, including a description of the first step. x2 - 10y2 = 16-8x2 + 7y2 = 4
What will be an ideal response?
Either method may be used. Elimination may be used since the equations have the same types of terms (x2, y2, constant). If elimination is used, then the first equation should be multiplied by -8 or 8. Substitution may be used efficiently, since a coefficient of the first equation is 1. If substitution is used, then the first equation should be solved for x2.
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Solve the problem.A fisherman is about to reel in a 20-lb fish located 14 ft directly below him. If the fishing line weighs 1 oz per foot, how much work will it take to reel in the fish? Round your answer to the nearest tenth, if necessary.
A. 292.3 ft ? lb B. 378 ft ? lb C. 286.1 ft ? lb D. 294 ft ? lb
State the name of the property illustrated.(x + 7) + [-(x + 7)] = 0
A. Commutative property of addition B. Identity property of multiplication C. Inverse property of addition D. Inverse property of multiplication
Write the fraction in lowest terms.
A. 
B. 
C. 
D. 
Describe the zero vector (the additive identity) of the vector space 
.
?
A. ?
B. ??
C. ?
D. ??
E. ??