Find the exact value of the expression.sin 20° cos 100° + cos 20° sin 100°
A. 
B. 
C. - 
D. - 
Answer: B
Mathematics
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Solve the system.x - y + z = -1x + y + z = -11x + y - z = -3
A. {(-2, -5, -4)} B. ? C. {(-4, -2, -5)} D. {(-2, -4, -5)}
Mathematics
Identify the number as prime, composite, or neither.54
A. Composite B. Neither C. Prime
Mathematics
Solve the problem.To save for retirement, Sue decides to deposit $2000 into an IRA at the end of each year for the next 40 years. If the interest rate is 5% per year compounded annually, find the value of the IRA after 40 years. (Round to the nearest dollar.)
A. $228,190 B. $241,600 C. $12,080 D. $1,581,497
Mathematics
Find all the complex roots. leave your answers in polar form with the argument in radians.fourth roots of -16
A. 
, 
, 
, 
B. 2
, 2
, 2
, 16
C.
16 , 16 , 16 , 16 |
D. 2
, 2
, 2
, 2
Mathematics