Solve for the requested variable.y varies directly as z, and y = 143 when z = 13. Find y when z is 19.
A. y = 169
B. y = 121
C. y = 361
D. y = 209
Answer: D
Mathematics
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Solve by the substitution method.x - 4y = -37x - 3y = -21
A. ? B. {(x, y)|x - 4y = -3} C. {(3, -1)} D. {(-3, 0)}
Mathematics
Find the average value of 
over the given region.
+ z2 over the rectangular solid in the first octant bounded by the coordinate planes and the planes 
, 
, 
A. 
B. 
C. 
D. 
Mathematics
Find the area bounded by the given curves.y = x3, y = x2
A. 
B. 
C. 
D. 
Mathematics
Find the value of the indicated variable for the values given.A = P 
nt ; determine A when P = 500, r = 5% , n = 12 and t = 5Round your answer to the nearest hundredth.
A. 620.11 B. 686.91 C. 631.40 D. 641.68
Mathematics