Translate the problem to a system of equations, then solve using matrices.A grain dealer sold to one customer 5 bushels of wheat, 2 of corn, and 3 of rye, for $42.40; to another, 2 of wheat, 3 of corn, and 5 of rye, for $43.30; and to a third, 3 of wheat, 5 of corn, and 2 of rye, for $40.10. What was the price per bushel for corn?
A. $1.60
B. $4.30
C. $3.60
D. $1.10
Answer: C
Mathematics
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Find the slope of the polar curve at the indicated point.r = 5 cos 3?, ? = 
A. 
B. - 
C. 
D. -
Mathematics
Find the first six terms of the sequence.a1 = 8, an = 1 - 
A. 8, 
, - 
, -8, 
, 
B. 8, 
, - 
, 8, 
, - 
C. 8, 
, 
, -6, 
, 
D. 8, - 
, 
, 
, - 
, 
Mathematics
Find the general solution of the differential equation. Use C, C1, C2, . . . to denote arbitrary constants. If used, do not simplify hyperbolic functions.y''(t) = 15e3t + sin 3t
A. y = 
- 
+ C1t
B. y = 
+ 
+ C1t + C2
C. y = 
- 
+ C1t + C2
D. y = 
+ 
+ C1t + C2
Mathematics
Solve the problem.If sin ? = 0.2, find sin (? + ?).
A. 0.2 B. -0.2 C. -0.8 D. 0.8
Mathematics