Provide an appropriate response.Decide whether the elimination method or the substitution method involves the least amount of work. Do not solve.-4x - 7y = 17-5x + 9y = -32
A. Elimination
B. Substitution
Answer: A
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Write the mixed number as an improper fraction. 7
A. 
B. 
C. 
D. 
Solve the problem.A twenty-five foot ladder just reaches the top of a house and forms an angle of 41.5° with the wall of the house. How tall is the house? Round your answer to the nearest 0.1 foot.
A. 18.7 ft B. 19 ft C. 18.8 ft D. 18.6 ft
Solve the problem.An open-top rectangular box has a square base and it will hold 256 cubic centimeters (cc). Each side of the base has length x cm. The box's surface area S is given by S(x) = 
+ x2. Estimate the minimum surface area and the value of x that will yield it.
A. 207 cm2 when x = 6 cm B. 256 cm2 when x = 6 cm C. 192 cm2 when x = 8 cm D. 256 cm2 when x = 8 cm
Find the nth term an of the geometric sequence.-4, -12, -36, -108, -324, . . .
A. an = (-4)(3)n-1 B. an = (-4)(3n) C. an = a1 + 3n D. an = (-4)(3)n