Find the center (h, k) and radius r of the circle with the given equation. 4x2 + 4y2 - 12x + 16y - 5 = 0
A. (h, k) = (- 
, 2); r = 
B. (h, k) = (- 
, 2); r= 
C. (h, k) = (
, -2); r = 
D. (h, k) = (
, -2); r = 
Answer: C
Mathematics
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Use reduction formulas to evaluate the integral.
A. - 
sin 2x cos3 2x + 
+ 
sin 4x + C
B. - 
sin 2x cos3 2x + 
+ 
cos 4x + C
C. - 
sin 2x cos3 2x + 
+ 
sin 4x + C
D. - 
sin 2x cos2 2x + 
+ 
sin 4x + C
Mathematics
Subtract.200 - 290
A. -90 B. 490 C. -490 D. 90
Mathematics
Solve the problem.How much pure acid should be mixed with 7 gallons of a 50% acid solution in order to get an 80% acid solution?
A. 10.5 gal B. 17.5 gal C. 28 gal D. 3.5 gal
Mathematics
Solve the equation by factoring.15x3 + 90x2 + 120x = 0
A. -4, -2
B. - 
, -2
C. 0, 4, 2
D. 0, -4, -2
Mathematics