Solve the problem.Helen Weller invested $13,000 in an account that pays 10% simple interest. How much additional money must be invested in an account that pays 13% simple interest so that the average return on the two investments amounts to 11%?
A. $13,000
B. $9000
C. $6500
D. $10,000
Answer: C
Mathematics
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Determine the symmetries of the curve.r2 = 6 sin 4?
A. y-axis only B. x-axis only C. Origin only D. x-axis, y-axis, origin
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The lengths of the legs of a right triangle are given. Find the hypotenuse.a = 6, b = 8
A. 10 B. 7 C. 5 D. 9
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Find the first term and the common difference of the arithmetic sequence described. Give a formula for the nth term of the sequence.10th term is 23; 16th term is 25
A. a = 20; d = 
; an = 
n + 
B. a = 14; d = 3; an = 3n + 11
C. a = 20; d = - 
; an = 
n - 
D. a = 20; d = - 
; an = 
n - 20
Mathematics
Find the inverse of the matrix, if possible.A = 
A. 
B. 
C. 
D. 
Mathematics